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Aleks [24]
3 years ago
15

PLS HELP ME ASAP! FOR 15 POINTS AND DONT GIVE ME A LINK

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
8 0

Answer:

C. x = 3, y = -6 is the answer.

Step-by-step explanation:

1. Isolate x for x = 2y = 15 -> x = 15 + 2y

2. Substitute x = 15 + 2y -> [2 (15 + 2y) + 4y = -18]

3. Simplify -> [30 + 8y = -18)

4. Isolate y for 30 + 8y = -18 -> y = -6

5. For x = 15 + 2y, substitute y = -6 -> x = 15 + 2(-6)

So, x = 3 and y = -6 are the solutions to this system of equations.

Hope this helps! :)

And also you should use Symbolab, it gives all the answers and steps

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Simplify: ((-3)4)².
Darina [25.2K]

The value of the expression ((-3)^4)^2 when simplified is 6561

<h3>What are expressions?</h3>

Expressions are mathematical statements represented by numbers, arithmetic operations and variables

<h3>How to simplify the expression?</h3>

The expression is given as:

((-3)^4)^2

Start by expanding the inner bracket

((-3)^4)^2 = ((-3)*(-3)*(-3)*(-3))^2

Next, we evaluate the product (-3)*(-3)*(-3)*(-3)

This gives

((-3)^4)^2 = (81)^2

Next, expand the exponent

((-3)^4)^2 = (81) * 81

Next, we evaluate the product

This gives

((-3)^4)^2 = 6561

Hence, the value of the expression ((-3)^4)^2 when simplified is 6561

Read more about expressions at:

brainly.com/question/723406

#SPJ1

7 0
2 years ago
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Lunna [17]
Can you make that more dicriptive
8 0
3 years ago
What is the first step in solving the quadratic equation -5x^2+8=133?
bezimeni [28]

Answer:

a) subtracting '8' on both sides, we get

                                      - 5 x² + 8-8 = 133-8

                                        - 5 x²  = 125

b) The solution is x = 5 i

Step-by-step explanation:

<em>Explanation</em>:-

<u><em>Step (i):</em></u>-

Given quadratic equation  - 5 x² + 8 = 133

subtracting '8' on both sides, we get

                                      - 5 x² + 8-8 = 133-8

                                       - 5 x²  = 125

<u><em>Step(ii)</em></u>:-

dividing '-5' on both sides, we get

          \frac{-5 x^2}{-5} = \frac{125}{-5}

            x²  = -25

            x = \sqrt{-25}

            x = 5 i

                                 

                                   

8 0
4 years ago
Read 2 more answers
5f + 3s +6<br> use f= 6 and s = 7
Luden [163]
57 because 5(6)+3(7)+6 is 30+21+6=57
6 0
4 years ago
What are the solutions to x2+14x+40=0
torisob [31]

Answer:x

2−14x+40=0 Factor x2−14x+40 using the AC method.(x−10)(x−4)

0 If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.x−10=0x−4=0 Set the first factor equal to 0 and solve.x=10Set the next factor equal to 0and solve....x=4

The final solution is all the values that make (x−10)(x−4)=0 true x=10,4

Step-by-step explanation:IDK

7 0
4 years ago
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