pleaseee helpp i need help with this math problem

Answer:

-7/32

Step-by-step explanation:

Multiply,Simplify

Answer:

-1 1/3

Step-by-step explanation:

cross multiply

-3×12=-36

-8×7=-56

simplify

-4/-3

simplify

-1 1/3

Step-by-step explanation:

please watch reflection in the picture

Answer:

a) 55 degrees

b) 350 ft.

Step-by-step explanation:

a- the sum of angles of triangle=180

( since it is right angle , one angle is 90 degrees), x be the acute angle

x+35+90=180

x=180-125

x=55 degrees

b) tan 35= height of a tree/ length of a shadow

height of a tree=tan35*500=350.103≅350 ft ( rounded to nearest tens)

c)  hypotenuse²=350.1²+500²

c=√350.1²+500²

c=610.385 ft

d) no because the distance is more than 500

43% of elementary students chose something other than blue, red, or yellow as their favorite color.

Blue: 24%

Red: 17%

Yellow: 16%

Total: 24% + 17% + 16% = 57%

Percentage chose something other:

100% - 57% = 43%.

Therefore, 43% of elementary students chose something other than blue, red, or yellow as their favorite color.

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Answer:

He added $25 to the contents of his wallet.

Step-by-step explanation:

Here's what's happening, symbolically:

$6 + m = $31, or m = $25.  Jake added $25 (represented by m) to the contents of his wallet.

Answer:

67.5 units²

Step-by-step explanation:

We can break this problem down in two parts: The upper triangle and the lower trapezoid.

The upper triangle:

Use the formula \(\frac{1}{2} (b)(h)\) to compute the area of the triangle. Base = 10 and Height = 7.

1/2 (10)(7)

1/2 (70)

=35 units².

The lower trapezoid:

Use the formula \(\frac{1}{2}(base_{1} + base_{2}) (height)\) to compute the area of the trapezoid. Base 1 = 10, Base 2 = 3 and Height = 5.

1/2 (10 + 3)(5)

1/2 (13)(5)

1/2 (65)

=32.5 units²

So, add the two areas of each shape:

35 + 32.5 = 67.5 units².

Answer:

Step-by-step explanation:

67.5 is the answer and thanks for asking

RNA's capability to self-replicate and catalyze chemical reactions make it the best candidate for the first life-form.

According to the scientists, RNA is considered the best candidate for the first life-form due to the fact that RNA is capable of self-replication and catalysis. This is possible because RNA can act both as a template to produce copies of itself and also as an enzyme to accelerate chemical reactions. These abilities suggest that RNA could have played a role in the emergence of the first living organisms on Earth.

An RNA molecule has the ability to catalyze reactions, which means that it can speed up chemical reactions without itself being altered. Thus, it is capable of serving as an enzyme. Scientists believe that the first life-form must have been capable of self-replication and catalysis, and RNA is capable of both functions.

This capability is significant because it is fundamental for the origin of life. Hence, RNA is believed to have played a significant role in the emergence of the first living organisms on Earth.

To conclude, RNA's capability to self-replicate and catalyze chemical reactions make it the best candidate for the first life-form.

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RNA is considered the best candidate for the first life-form by scientists because RNA is capable of self-replication and catalysis.

The correct option is the first one due to following reasons:

As a result, scientists believe that RNA may have played a crucial role in the origins of life on Earth.

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Expression is equivalent to 64y¹⁸ - 1000z⁶ : (4y⁶)³- (10z²)³

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Answer:

I think that it is 74 i did 102-28.

Step-by-step explanation:

hope this is helpful!!;)

Answer:

y = -24

Step-by-step explanation:

Solve for y:

y/8 + 38 = 35

Put each term in y/8 + 38 over the common denominator 8: y/8 + 38 = y/8 + 304/8:

(y/8 + 304/8) = 35

y/8 + 304/8 = (y + 304)/8:

((y + 304)/8) = 35

Multiply both sides of (y + 304)/8 = 35 by 8:

(8 (y + 304))/8 = 8×35

(8 (y + 304))/8 = 8/8×(y + 304) = y + 304:

y + 304 = 8×35

8×35 = 280:

y + 304 = 280

Subtract 304 from both sides:

y + (304 - 304) = 280 - 304

304 - 304 = 0:

y = 280 - 304

280 - 304 = -24:

Answer: y = -24

To use the simplify square roots calculator, you need to enter the value whose square root you want to simplify and click on the "Simplify" or "Calculate" button to get the simplified form of the square root.

A simplify square roots calculator is a tool that simplifies square roots of numbers to their simplest form. To use this calculator, you simply need to enter the value whose square root you want to simplify. Here are the steps to use a simplify square roots calculator:

The simplify square roots calculator can be helpful in solving problems in algebra and calculus, as well as in everyday life, such as when working with measurements that involve square roots.

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Answer:

y = 4x^2 + 32x + 28

Step-by-step explanation:

Before we can find the standard form of the quadratic function with the given coordinates, we must first start with the intercept form, whose general equation is

y = a(x - p)(x - q), where

Step 1:  We can plug in (-6, -20) for x and y, -7 for p and -1 for q into the intercept form.  This will allows us to solve for a:

-20 = a(-6 - (-7))(-6 - (-1))

-20 = a(-6 + 7)(-6 + 1)

-20 = a(1)(-5)

-20 = -5a

4 = a

Thus, the full equation in vertex form is

y = 4(x + 7)(x + 1).

Step 1:  The general equation for standard form is

y = ax^2 + bx + c.

We can convert from vertex to standard form by simply expanding the expression.  Let's ignore the 4 for a moment simply focus on (x + 7)(x + 1).

We can expand using the FOIL method, where you multiply

We see that the first terms are x and x, the outer terms are x and 1, the inner terms are 7 and x and the last terms are 7 * 1.  Now, we multiply and simplify:

(x * x) + (x * 1) + (7 * x) + (7 * 1)

x^2 + x + 7x + 7

x^2 + 8x + 7

Step 3:  Now, we can distribute the four to each term with multiplication:

4(x^2 + 8x + 7)

4x^2 + 32x + 28

Optional Step 4:  We can check that our quadratic function in standard form, by plugging in -7, -1, and -6 for x and seeing that we get 0 as the y value for both x = -7 and x = -1 and -20 as the y value for x = -6:

Checking that (-7, 0) lies on the parabola of 4x^2 + 32x + 28:

0 = 4(-7)^2 + 32(-7) + 28

0 = 4(49) - 224 + 28

0 = 196 - 196

0 = 0

Checking that (-1, 0) lies on the parabola of 4x^2 + 32x + 28:

0 = 4(-1)^2 + 32(-1) + 28

0 = 4(1) - 32 + 28

0 = 4 - 4

0 = 0

Checking that (-6, -20) lies on the parabola of 4x^2 + 32x + 28:

-20 = 4(-6)^2 + 32(-6) + 28

-20 = 4(36) -192 + 28

-20 = 144 -164

-20 = -20

I attached a graph from Desmos to show how the function y = 4x^2 + 32x + 28 contains the points (-7, 0), (-1, 0), (-6, 20), further proving that we've correctly found the quadratic function in standard form passing through these three points

Answer:

19

Step-by-step explanation:

corresponding angles equal each other

9x-25=8x-6

x-25=-6

x=19

Answer:

X = -7

Step-by-step explanation:

Joule per meter second is the unit of measurement for momentum flux or power per unit area. It is commonly used in physics and engineering to quantify the rate of energy transfer or momentum flow per unit area.

Joule per meter second (J/m^2s) is not the correct unit for momentum flux or power per unit area. The correct unit for momentum flux is Newton per square meter (N/m^2), also known as Pascal (Pa), while the correct unit for power per unit area is watt per square meter (W/m^2). The joule per meter second (J/m^2s) is actually the unit for volumetric energy dissipation rate, which measures the rate at which energy is being dissipated within a fluid volume per unit volume. It is used in the study of fluid dynamics and turbulence.

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Answer:

$8.34

Step-by-step explanation:

Simply divide $25.02 by three, since three people are splitting the cost.

To find the probability density function (PDF) for the cost U, we need to determine the distribution of U using the transformation method.

First, let's find the cumulative distribution function (CDF) of U. We know that U = 2Y^2 + 3, where Y is uniformly distributed over the interval [1, 5]. The CDF of U, denoted as F_U(u), can be found by evaluating P(U ≤ u).

To find F_U(u), we can express it in terms of the CDF of Y, denoted as F_Y(y). Since Y is uniformly distributed over [1, 5], the CDF of Y is given by:

F_Y(y) = (y - 1) / (5 - 1) = (y - 1) / 4

Now, we can express F_U(u) as follows:

F_U(u) = P(U ≤ u) = P(2Y^2 + 3 ≤ u)

To solve this inequality for Y, we need to consider two cases:

Case 1: If u < 3, then 2Y^2 + 3 ≤ u has no solution, and the probability is 0.

Case 2: If u ≥ 3, then we have:

2Y^2 + 3 ≤ u

Y^2 ≤ (u - 3) / 2

Y ≤ √[(u - 3) / 2]

Since Y is uniformly distributed over [1, 5], the maximum value of Y is 5. Therefore, the inequality becomes:

Y ≤ √[(u - 3) / 2], for 1 ≤ Y ≤ √[(u - 3) / 2] ≤ 5

Now, we can write the CDF of U:

F_U(u) = P(U ≤ u) = P(Y ≤ √[(u - 3) / 2]) = F_Y(√[(u - 3) / 2]) = (√[(u - 3) / 2] - 1) / 4

To find the PDF of U, we differentiate the CDF with respect to u:

f_U(u) = d/dx [F_U(u)] = d/dx [(√[(u - 3) / 2] - 1) / 4]

After simplifying and solving the derivative, we obtain:

f_U(u) = 1 / (8√[(u - 3) / 2])

Therefore, the probability density function (PDF) for U is:

f_U(u) = 1 / (8√[(u - 3) / 2]), for u ≥ 3

This is the PDF that represents the distribution of the cost U based on the given transformation from the waiting time Y.

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The probability that the obstetrician has delivered no child with polydactyly is 0.8187.

To find the probability that the obstetrician has delivered no child with polydactyly, we can use the formula:

P(no polydactyly) = \((1 - P(polydactyly))^{number of births}\)

First, we need to find the probability of a child having polydactyly. This is given as 1 in every 500, which can be expressed as a decimal: 1/500 = 0.002.

Next, we find the probability of a child not having polydactyly: 1 - 0.002 = 0.998.

Now, we can find the probability of the obstetrician delivering no child with polydactyly in 100 unrelated and independent births by raising the probability of no polydactyly to the power of the number of births (100):

P(no polydactyly in 100 births) = (0.998)¹⁰⁰ ≈ 0.8187

So, the probability that the obstetrician has delivered no child with polydactyly is approximately 0.8187.

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Answer:

7/2

Step-by-step explanation:

Firstly lets put them all in common denominators (LCM) 3,2,4 and 8 re all divided by 24.

17/8 x 3/3 = 51/24

7/2 x 12/12 = 84/24

9/4 x 6/6=54/24

10/3 x 8/8= 80/24

Now lets see which one is greatest: 7/2 or 84/24

Hope this helps :D

Answer:

7/2

Step-by-step explanation:

10/3 = 3.333

7/2 = 3.500

9/4 = 2.250

17/8 = 2.125

Answer: Choice D.  (0,-2)

Note how this point is in the blue region, but it is not in the red region. The solution must satisfy all of the shaded regions of the system of inequalities. The red and blue regions overlap to form the darker shaded region on the right side (the somewhat grayish purple triangular region). Points in this darkest shaded region are solutions to the system. The points (5,2), (0,3) and (4,0) are all located in this region so they are solutions.

Erm, would you mind making the format easier to decipher?

Answer:

B.

(

135

×

1

100

)

×

(

14

×

1

10

)

(

135

×

14

)

×

(

1

100

×

1

10

)

Step-by-step explanation:

Two adjacent angles that are supplementary whose non common sides are opposite rays are linear pairs.

Given :

two adjacent angles that are supplementary whose non-common sides are opposite rays.

What are linear pair of angles ?

The linear pair of an angle sums up to 180 degrees .

A linear pair is two adjacent angles whose non-common sides form opposite rays .

The two angles m∠1 and m∠2 hence form a linear pair .

Hence we can conclude that two adjacent angles whose non common sides are opposite rays are linear pairs.

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Answer:

Step-by-step explanation:

Since we know that Ivan finished all his science problems (3) we know that there are only math problems remaining

substract the science problems from the total 43-3=40

And now we can determine the amount of math problems

4/5 = 40/x where x is the total amount of math problems Ivan was assigned

cross multiply

4x = 5*40

4x=200

isolate the variable

4x/4 = 200/4

x=50

So Ivan was assigned a total of 50 math problems

(Note*) since there are 40 math problems finished 40/50 is equal to 4/5. Just a tip if you don't want to do the whole calculation

Hope this helps!

Answer:

I believe it would be the first and the second

Step-by-step explanation:

Trees would be competing to get the sunlight, deer would be competing for mating reasons.

Answer:

It would be 1 and 3 because they are competing for something/ tree competes for light, lion competes for food

Answer:

3(3x+5)

Step-by-step explanation:

You factor of 3 from both so 9/3 is 3 plus the x and 15/3 is 5 so you would get 3(3x+5)

Answer:

y = 21

Step-by-step explanation:

given y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

to find k use the condition y = 7 when x = 4 , then

7 = 4k ( divide both sides by 4 )

\(\frac{7}{4}\) = k , that is

k = 1.75

y = 1.75x ← equation of variation

when x = 12 , then

y = 1.75 × 12 = 21

We can say that the value of k will be equal to the y-coordinate of the center of the circle (since k represents the y-coordinate of the center).

To answer this question, we need to use the equation of a circle:

(x - h)^2 + (y - k)^2 = r^2

Where h and k represent the coordinates of the center of the circle, and r represents the radius. In this case, we are given that the circle has center (h, k) and radius 10. So we can write:

(x - h)^2 + (y - k)^2 = 10^2

We are asked to find the value of k. To do this, we need to look at the equation of the circle and notice that the y-coordinate is paired with k. This means that we can isolate k by rearranging the equation as follows:

(y - k)^2 = 10^2 - (x - h)^2

y - k = ±√(10^2 - (x - h)^2)

k = y ±√(10^2 - (x - h)^2)

Since we don't have any information about the x-coordinate, we can't solve for a specific value of k. However, we can say that the value of k will be equal to the y-coordinate of the center of the circle (since k represents the y-coordinate of the center). Therefore, the answer is:

k = y

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