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viktelen [127]
3 years ago
14

Solve the system using addion 7x+2y=-13 -7x+y=25

Mathematics
1 answer:
larisa [96]3 years ago
5 0

Answer:

x = -3

y = 4

Step-by-step explanation:

7x + 2y = -13

-7x + y = 25

3y = 12

-7x + y = 25

y = 4

-7x + 4 = 25

y = 4

-7x = 21

y = 4

x = -3

there is only 1 solution for this equation is (-3,4)

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The graph shows the savings in Andre’s bank account.
Gre4nikov [31]

Answer:

As the number of week increases, the Andre's savings also increases

Step-by-step explanation:

Given

The attached graph

Required

Explain what the slope represents (Missing part of the question:)

First, we'll check the slope of the graph.

Represent time in weeks with x and savings in dollar with y

So, we have the following details:

(x_1,y_1) = (0,40)

(x_2,y_2) = (8,80)

Slope (m) is then calculated as thus:

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{80 - 40}{8 - 0}

m = \frac{40}{8}

m = 5

The calculated slope is positive and this implies that: <em>As the number of week increases, the Andre's savings also increases</em>

8 0
3 years ago
The answer is B.<br><br> ..........................
myrzilka [38]

I think you are correct, please let me know if I am correct

I hope I helped

X8lue83rryX

3 0
3 years ago
Please help any tips greatly appreciated:)
Anton [14]

Answer:

15

Step-by-step explanation:

For this question we have the hypotonouse and need the opposite side

so out of SOH, CAH, TOA we will use SOH

sin(52)=x/19

19sin(52)=x

x=14.9722

which rounds to

15

4 0
3 years ago
A gift box has a length of 14 inches, a height of 8 inches, and a width of 6 inches. how many square inches of wrapping paper ar
arsen [322]
Because you are looking for square inches of wrapping paper, you are looking for the surface area of the box. A three-dimensional box has a top and bottom that are the same size, a front and back that are the same size, and 2 sides that are the same size...or SA = 2(top/bottom area) + 2(front/back area) + 2(side/side area). Our equation fills in nicely like this:
SA = 2(6 * 14) + 2(6 * 8) + 2(14 * 8)
SA = 2(84) + 2(48) + 2(112)
SA = 168 + 96 + 224
SA = 488 square inches of paper to wrap the box.
3 0
3 years ago
What is 68.797 rounded to the nearest hundredth
yarga [219]
68.80 because 7 is greater than 5
3 0
3 years ago
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