Use the elimination method by subtraction to solve for x and then y.
Equation 1 > 2x - 7y = -74
Equation 2 > 3x - 7y = -83
Solve for x and y.
Please and thank you!​

Answer:

$30,770

Step-by-step explanation:

Add all of the numbers together to find out cost for materials.

The comparisons that are true are 11. -5 < 0 12. 9 > -8 14. 55 > -75 15. -32 < -24 16. 89 > 73 17. -58 < -51  19. 17 < 23  20. 18 > -36 and that is not true are 13. -7 = -7 (not true) 18. -32 > 4 (not true)

To make each statement true, write < or >. We need to compare two values for each statement to determine whether it is true or false.

To indicate that the first value is less than the second value, write <.

Alternatively, to indicate that the first value is greater than the second value, write >.

Below are the comparisons: 11. -5 < 0 12. 9 > -8 13. -7 > -7 14. 55 > -75 15. -32 < -24 16. 89 > 73 17. -58 < -51 18. -32 > 4 19. 17 > 23 20. 18 > -36

To determine the direction of inequality, we need to compare the values.

We used inequality signs such as > (greater than) or < (less than) to indicate which value is larger or smaller than the other.

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The correct question would be as

Write > or < to make each statement true.

11. -5 0

12. 9 -8

13. -7 7

14. 55 -75

15. -32 -24

16. 89 73

17. -58 -51

18. -32 4

19. 17 23

20. 18 -36​

The value of x is (-∞, -5) ∪ (1, ∞).

Given is a polynomial, \(x^4+2x^3-12x^2+14x-5 > 0\),

Solving for x,

Factors =

\(x^4+2x^3-12x^2+14x-5\\ \\= \quad \left(x-1\right)^3\left(x+5\right)\)

Therefore,

\(\left(x-1\right)^3\left(x+5\right) > 0\)

\(x < -5\quad \mathrm{or}\quad \:x > 1\)

Hence the value of x is (-∞, -5) ∪ (1, ∞).

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Answer:

y = 12 x = 12\(\sqrt{3}\)

Step-by-step explanation:

This is a 60, 90, 30. It's a special triangle.

2z = 24

z = 12

If x = z\(\sqrt{3}\)

then x = 12\(\sqrt{3}\)

y = z itself

So y = 12

Answer:

36

Step-by-step explanation:

30 - 6 = 24

24 ÷ 4 = 6

6 × 6 = 36

36 bottles of water

\(\qquad \qquad \textit{inverse proportional variation} \\\\ \textit{\underline{y} varies inversely with \underline{x}} ~\hspace{6em} \stackrel{\textit{constant of variation}}{y=\cfrac{\stackrel{\downarrow }{k}}{x}~\hfill } \\\\ \textit{\underline{x} varies inversely with }\underline{z^5} ~\hspace{5.5em} \stackrel{\textit{constant of variation}}{x=\cfrac{\stackrel{\downarrow }{k}}{z^5}~\hfill } \\\\[-0.35em] ~\dotfill\)

\(\stackrel{\textit{"y" varies inversely with "x"}}{y = \cfrac{k}{x}}\hspace{5em}\textit{we also know that} \begin{cases} x=4\\ y=16 \end{cases} \\\\\\ 16=\cfrac{k}{4}\implies 64 = k\hspace{9em}\boxed{y=\cfrac{64}{x}} \\\\\\ \textit{when x = 32, what's "y"?}\qquad y=\cfrac{64}{32}\implies y=2\)

Answer:

bxjzjjxhx

Step-by-step explanation:

zjjxjxbz1+1+1++1+1++1

A function is a relationship between a few different inputs and an output, where each input can only lead to one possible outcome.

(i) The exponential function that models the decay of the substance is given by:

\(N(t) = Noe^(-0.088t)\)

(ii) If \(400g\) of the substance is present at to, then  \(No = 400g\) . Therefore, the amount of the substance remaining after 3 days is:

\(N(3) = 400e^(-0.0883) = 309.21g\)  (rounded to two decimal places)

(iii) The rate of change of the amount of the substance after 3 days is given by:

 \(dN/dt = -0.088N(3) = -0.088309.21 = -27.21 g/day\) (rounded to two decimal places)

(iv) To find the number of days it takes for half of the original \(400g\) of the substance to remain, we need to solve the equation:

\(N(t) = 0.5No\)

\(0.5No = Noe^(-0.088t)\)

\(0.5 = e^(-0.088t)\)

\(ln(0.5) = -0.088t\)

\(t = ln(0.5)/(-0.088) = 7.89 days\) (rounded to two decimal places)

Therefore, after  \(7.89\) days, half of the original  \(400g\) of the substance will remain.

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The most appropriate choice for Arithmetic series will be given by -

Sum from first \(m^{th}\) term to the \(n^{th}\) term = \(\frac{1}{2}[a_1(n - m)+na_n-ma_m]\)

What is arithmetic series?

Arithmetic series is a series where the consecutive terms of the series maintains a constant difference known as the common difference of the series.

If a be the first term of the series and d be the common difference of the series, then \(n^{th}\) term of the series \(a_n\) is given by

\(a_n = a+(n-1)d\)

Here,

The sum of the first n terms of the arithmetic progression =

                                                                                        \(\frac{n}{2}(a_1 + a_n)\)

The sum of the first m terms of the arithmetic progression =

                                                                                        \(\frac{m}{2}(a_1 + a_m)\)

Sum from first \(m^{th}\) term to the \(n^{th}\) term =    \(\frac{n}{2}(a_1 + a_n)\) - \(\frac{m}{2}(a_1 + a_m)\)

                                                                 = \(\frac{1}{2}(na_1 + na_n-ma_1-ma_m)\)

                                                                 = \(\frac{1}{2}[a_1(n - m)+na_n-ma_m]\)

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Answer:

The second store with the 6 foot is better pricing.

Step-by-step explanation:

find out how much each foot cost on each sandwich

42.5/5=8.5

49.5/6=8.25

The first store sells each foot of sandwich for 25 cents cheaper.

Answer:

\(P=\$276646.153\)

Step-by-step explanation:

Time \(T=30years\)

Rate \(r=0.325\%\)

Payment per month \(P=\$ 900\)

Generally the equation for Principle  is mathematically given by

\(M=\frac{P r}{1-(1+r)^{-n}}\)

\(900=\frac{P \frac{0.325}{100}}{1-(1+( \frac{0.325}{100}))^{- 30*12}}\)

\(P=\frac{900*100*0.99}{0.325}\)

\(P=\$276646.153\)

Answer:

Yes, it is a solution because inserting 8 into the equation gives you 13.

Step-by-step explanation:

1/2(8) + 9 = 13

4 + 9 = 13

13 = 13

The total weight of the liquid in the tank is approximately 12,628 pounds.

To calculate the weight of the liquid, we need to determine the volume of the hemisphere and then multiply it by the density of the liquid. The formula for the volume of a hemisphere is V = (2/3)πr³, where r is the radius of the hemisphere.

In this case, the diameter of the tank is given as 24 feet, so the radius is half of that, which is 12 feet. Plugging this value into the formula, we get V = (2/3)π(12)³ ≈ 904.78 cubic feet.

Finally, we multiply the volume by the density of the liquid: 904.78 cubic feet * 92.5 pounds per cubic foot ≈ 12,628 pounds. Therefore, the total weight of the liquid in the tank is approximately 12,628 pounds.

In summary, to calculate the weight of the liquid in the tank, we first determine the volume of the hemisphere using the formula V = (2/3)πr³. Then, we multiply the volume by the density of the liquid.

By substituting the given diameter of 24 feet and using the appropriate conversions, we find that the total weight of the liquid is approximately 12,628 pounds.

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Answer:

Step-by-step explanation:

No, 3/4 is equivalent to 0.75 so 0.34 and 3/4 are not equivalent.

Answer:

no

Step-by-step explanation:

because 3/4 equals to 0.75 or 75%

1/4 = 0.25 or 25%

2/4 or 1/2 = 0.50 or 50%

3/4 = 0.75 or 75%

4/4 or 1 = 1 or 100%

Answer:

Por lo tanto, el área de la fórmula de trapecio se da como: Área de un trapecio, A = h (a + b) / 2 unidades cuadradas. "h" es la altitud o altura. Sea a y b la longitud de los lados paralelos de un trapecio ABCD, como a es la longitud de la base y b es la longitud del lado paralelo a a.

Step-by-step explanation:

The value of q is 0.35.

The value of p is 0.16.

The value of r is 0.27.

The value of P(A given NOT B) is approximately 0.4211.

To calculate the values of p, q, and r, we can use the information provided in the Venn diagram and the probabilities of events A and B.

Given:

P(A) = 0.43

P(B) = 0.62

P(A∩B) = 0.27

Calculating the value of p:

The value of p represents the probability of event A occurring without event B. In the Venn diagram, p corresponds to the region inside A but outside B.

We can calculate p by subtracting the probability of the intersection of A and B from the probability of A:

p = P(A) - P(A∩B)

= 0.43 - 0.27

= 0.16

Therefore, the value of p is 0.16.

Calculating the value of q:

The value of q represents the probability of event B occurring without event A. In the Venn diagram, q corresponds to the region inside B but outside A.

We can calculate q by subtracting the probability of the intersection of A and B from the probability of B:

q = P(B) - P(A∩B)

= 0.62 - 0.27

= 0.35

Therefore, the value of q is 0.35.

Calculating the value of r:

The value of r represents the probability of both event A and event B occurring. In the Venn diagram, r corresponds to the intersection of A and B.

We are given that P(A∩B) = 0.27, so the value of r is 0.27.

Therefore, the value of r is 0.27.

Finding the value of P(A given NOT B):

P(A given NOT B) represents the probability of event A occurring given that event B does not occur. In other words, it represents the probability of A happening when B is not happening.

To calculate this, we need to find the probability of A without B and divide it by the probability of NOT B.

P(A given NOT B) = P(A∩(NOT B)) / P(NOT B)

We can calculate the value of P(A given NOT B) using the provided probabilities:

P(A given NOT B) = P(A) - P(A∩B) / (1 - P(B))

= 0.43 - 0.27 / (1 - 0.62)

= 0.16 / 0.38

≈ 0.4211

Therefore, the value of P(A given NOT B) is approximately 0.4211.

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The calculated value of the volume of the solid is (d) V = ∫[0,2] (x² + 1) - (2x + 1) dx

To find the volume of the solid when the region R is rotated about the horizontal line y = -1, we can use the method of cylindrical shells.

The height of each cylindrical shell will be the difference between the function y = 2x and the horizontal line y = -1, which is (2x + 1).

The radius of each cylindrical shell will be the distance from the axis of rotation (y = -1) to the function y = x².

This distance is given by (x² + 1).

The thickness of each cylindrical shell will be dx.

Thus, the volume of the solid can be expressed as:

V = ∫[0,2] (x² + 1) - (2x + 1) dx

Hence, the expression is (d) V = ∫[0,2] (x² + 1) - (2x + 1) dx

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Answer:

82.2

Step-by-step explanation:

The difference is subtracting:

678 - 595.8 = 82.2

Answer:

82.2

Step-by-step explanation:

Check the image below.

The graph of the function y = 2x⁴ - 5x³ + x² - 2x + 4 is plotted and attached.

We have the 4 functions as shown in the image attached.

The y - intercept is the point where the graph intercepts the y - axis.

Function [1] -

y = 4 + 2x

y - intercept is 4

Function [2] -

y = 5ˣ + 1

y - intercept is 2.

Function [3] -

the y-intercept is 1.

Function [4] -

the y - intercept is at -1.

Therefore, the greatest y-intercept is of function -

f(x) = 2x + 4

and the least y-intercept is of the function shown in graph [4] or function [4].

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Answer:

Carlos puts $3 into his bank account and it grows by 50% each year

f(x)=4^x+1

(The Table)

(The Graph)

Answer:

use photomath and if that dont work use m a t h w a y

Step-by-step explanation:

Answer:

2 i think i dint sleep last night sorry if im wrong

Step-by-step explanation:

Answer:

Step-by-step explanation:

side of square=√(2²+2²)=√8

perimeter of square=4√8=4×2√2=8√2≈11.31 units

Answer:

Step-by-step explanation:

sp = 504

gain = 12%

in this case

sp =100%+12%=504

112%=504

1%=504/112 =4.5

100%=450

so cost =$450

Hope im correct, if i am im glad to be of service.

Answer:

B.

Step-by-step explanation:

Answer: B

Step-by-step explanation:

Answer:

no

Step-by-step explanation:

y > 2x - 5

9 > 2(7) - 5

9 > 14 - 5

9 > 9. not a solution

9=9

The volume of the solid obtained by rotating the region between the curves x = 2√5y, x = 0, and y = 3 about the y-axis is 36π cubic units.

In calculus, finding the volume of a solid obtained by rotating a region about a line is an important topic. It involves using integration to calculate the volume of the solid.

To find the volume of the solid, we need to use the method of cylindrical shells. This involves taking thin slices of the solid perpendicular to the axis of rotation, finding their volume, and adding them up to get the total volume.

The first step is to sketch the region and the axis of rotation. In this case, the region is bounded by the curves x = 2√5y, x = 0, and y = 3, and the axis of rotation is the y-axis.

Next, we need to express the curves in terms of y. We can rewrite the equation x = 2√5y as y = x²/(20), and since the region is bounded by x = 0 and y = 3, the limits of integration are y = 0 and y = 3.

Now we can set up the integral for the volume using the formula for cylindrical shells:

V = 2π ∫(y)(f(y))dy from a to b,

where f(y) is the distance from the axis of rotation to the curve at a given value of y, and a and b are the limits of integration.

In this case, f(y) is simply the x-coordinate of the curve, which is x = 2√5y. Therefore, we have:

V = 2π ∫(y)(2√5y)dy from 0 to 3

Simplifying and evaluating the integral, we get:

V = 36π

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Answer:

Step-by-step explanation:

A ∩ B = {0, 2, 6}

Using the concept of ratio, the rate at which questions were answered correctly is 0.867 which is option B

Rate can be defined as comparing two or more ratio with a standard value.

The rate of correct answer can be calculated using the ratio between the number of correct answers to numbers of questions answered.

The rate is given as;

rate = 65 / 75

rate = 0.867

The rate of correct answers is 0.867

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Answer:

34m = c

Step-by-step explanation:

For every month (m) you pay 34 dollars. However many months youu use that service time 34 equals your total cost (c).

Answer:

\(let \: cost \: be \: { \bf{c}} \: and \: months \: be \: { \bf{n}} \\ { \bf{c \: \alpha \: n}} \\ { \bf{c = kn}} \\ 34 = (k \times 1) \\ k = 34 \: dollars \\ \\ { \boxed{ \bf{c = 34n}}}\)