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sasho [114]
3 years ago
13

10. 4x - 7y = 3x - 7y = -15​

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
5 0

Answer:

(2/5,-1/5)

Step-by-step explanation:

solve the second equation for x

x = -7y - 1

replace the x in the first equation

4•(-7y-1) - 7y = 3

- 35y = 7

solve for y

35y = - 7  

y = - 1/5  

which gives us

   x = -7y-1

   y = -1/5

then use the y value to solve for x

   x = -7(-1/5)-1 = 2/5  

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Answer:c i just did the test

Step-by-step explanation:

5 0
3 years ago
Please answer the following;
34kurt

The Surface area of the cube will be 433.5 square feet.  Then the correct option is C.

<h3>What is a surface area of a cube?</h3>

Suppose that: The side length of the considered cube is L units. Then, we get:

Surface area of that cube = 6L² square units.

Bella is wrapping a cube shape box that measures 8.5 inches along each side.

The edge length of the cube is 8.5 meters.

Then the Surface area of the cube will be

Surface area = 6 x 8.5²

Surface area = 6 x 72.25

Surface area = 433.5 square feet

The Surface area of the cube will be 433.5 square feet.

Then the correct option is C.

More about the surface area of the cube link is given below.

brainly.com/question/13789496

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6 0
2 years ago
What is the complete factorization of the polynomial function over the set of complex numbers?
quester [9]

Answer:

f(x)=(x-2)(x+2)(x-5)

Step-by-step explanation:

f(x)=x³-5x²+4x-20                 1. Just group randomly

f(x)=x²(x-5)+4(x-5)                2. Factor the groupings

f(x)=(x²+4)(x-5)                      

<u>f(x)=(x-2)(x+2)(x-5)</u>                3. Factor the difference of two squares

6 0
4 years ago
Read 2 more answers
DFG and JKL are complementary angles. M DFG = x+5 and m JKL=x-9. The measure of DFG is ___, and the measure of JKL is ___.
jeyben [28]

Answer:

C

Step-by-step explanation:

the sum of complementary angles = 90°, hence

x + 5 + x - 9 = 90

2x - 4 = 90 ( add 4 to both sides )

2x = 94 ( divide both sides by 2 )

x = 47

Thus ∠DFG = 47 + 5 = 52° and ∠JKL = 47 - 9 = 38°


6 0
3 years ago
Read 2 more answers
Which system has no solution.
elena55 [62]
There is no picture with this so I don’t know how to answer this
3 0
3 years ago
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