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Fittoniya [83]
2 years ago
5

Which of the following equations have a solution of y = 8

Mathematics
1 answer:
Naddika [18.5K]2 years ago
7 0

Answer:

B

Step-by-step explanation:

Plug in 8 for y in each equation to see if it's true

6+5(8)=46

6+40=46 ✔️

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Find the simplified product:<img src="https://tex.z-dn.net/?f=%5Csqrt%7B2x%5E%7B3%7D%20%7D-%5Csqrt%7B18x%5E%7B5%7D%20%7D" id="Te
mash [69]

Correct Question: Find the simplified product: \sqrt{2x^3}*\sqrt{18x^5}

Answer:

6x^4

Step-by-step explanation:

Based on the rules of radicals, since \sqrt{2x^3} and \sqrt{18x^5} has the same index (square root), therefore:

\sqrt{2x^3}*\sqrt{18x^5} = \sqrt{2x^3 * 18x^5}

To simplify this, multiply their bases together, and add their exponents.

= \sqrt{2*18x^{3+5}

= \sqrt{36x^{8}

Simplify further

= \sqrt{36}*\sqrt{x^8}

= \sqrt{6*6}*\sqrt{x^4*x^4}

= 6x^4

7 0
3 years ago
5x−4y=34<br> −x+8y=22<br> elimination
Brut [27]

Answer:

The solution to the system of equations is:

x=10,\:y=4

Step-by-step explanation:

Given the system of equations

\begin{bmatrix}5x-4y=34\\ -x+8y=22\end{bmatrix}

Multiply -x+8y=22 by 5:  -5x+40y=110

\begin{bmatrix}5x-4y=34\\ -5x+40y=110\end{bmatrix}

so adding the equations

-5x+40y=110

+

\underline{5x-4y=34}

36y=144

solve 36y = 144 for y:

36y=144

divide both sides by 36

\frac{36y}{36}=\frac{144}{36}

Simplify

y=4

For 5x-4y=34 plug in y=4

5x-4\cdot \:4=34

5x-16=34

Add 16 to both sides

5x-16+16=34+16

Simplify

5x=50

Divide both sides by 5

\frac{5x}{5}=\frac{50}{5}

Simplify

x=10

Therefore, the solution to the system of equations is:

x=10,\:y=4

3 0
2 years ago
Pls help me on these 2 questions !!
motikmotik

Answer:

1. 23

2. 8

Step-by-step explanation:

☆Cross multiply.

\frac{2}{10}  =  \frac{4}{a - 3}  \\  \\ 40 = 2(a - 3) \\ 40 = 2a - 6 \\   \frac{ + 6  =  \:  \:  \:  \:  \:  \:  \:  \:  + 6}{ \frac{46}{2} =  \frac{2a}{2}  }  \\  \\ 23 = a

--------

\frac{k}{6}  =  \frac{4}{3}  \\  \\  \frac{24}{ 3}  =  \frac{3k}{3}  \\  \\ 8 = k

3 0
3 years ago
A real number line can represent both real and imaginary numbers<br><br> True or false ?
forsale [732]

Answer:

True

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Help with these question
SVEN [57.7K]

Answer:

11. (x-2)/(x+8)

12. 9+t

13. h = 2A/b

Step-by-step explanation:

11. Since x is used to represent the number, 2 less than a number is x-2. 8 more than a number is x+8. The quotient of the first and second of these is the first one divided by the second one:

... (x -2)/(x +8) . . . . . parentheses are required unless the expression is typeset:

\dfrac{x-2}{x+8}

12. Apparently, we're to assume the salesman keeps on driving. If he had any sense (or a good union), he would stop after 9 hours. t hours added to 9 is ...

... 9 + t

13. Divide by the coefficient of h.

... h = A/((1/2)b) = 2A/b

5 0
3 years ago
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