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2 years ago

Please answer correctly!!! Will mark brainliest !!!

Mathematics

1 answer:

Mama L [17]2 years ago

4 0

Answer:

7^15/3^30

Step-by-step explanation:

Note how the exponents are negative. To make them positive, flip the numerator and the denominator (keep everything else the same). The equation becomes (7^3/3^6)^5.

Now, multiply the 5 by each exponent. The equation becomes 7^15/3^30, which is one of the options.

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Use substitution to solve the following system of equations. What is the value of y? {3x+2y=12{5x−y=7 A) y = -3B) y = 3C) y = -2

Vlad [161]

Answer

B) y = 3

Step-by-step explanation

Given the system of equations:

$\begin{gathered} 3x+2y=12\text{ \lparen eq. 1\rparen} \\ 5x-y=7\text{ \lparen eq. 2\rparen} \end{gathered}$

Isolating x from equation 1:

$\begin{gathered} 3x+2y-2y=12-2y \\ 3x=12-2y \\ \frac{3x}{3}=\frac{12-2y}{3} \\ x=\frac{12}{3}-\frac{2}{3}y \\ x=4-\frac{2}{3}y\text{ \lparen eq. 3\rparen} \end{gathered}$

Substituting equation 3 into equation 2 and solving for y:

$\begin{gathered} 5(4-\frac{2}{3}y)-y=7 \\ 5\cdot4-5\cdot\frac{2}{3}y-y=7 \\ 20-\frac{10}{3}y-y=7 \\ 20-\frac{13}{3}y=7 \\ 20-\frac{13}{3}y-20=7-20 \\ -\frac{13}{3}y=-13 \\ (-\frac{3}{13})\cdot-\frac{13}{3}y=(-\frac{3}{13})\cdot-13 \\ y=3 \end{gathered}$

6 0

8 months ago

1/2y+2/5=4 2/5 how do I solve this matter

Inessa [10]

Answer:

y =8

Step-by-step explanation:

1/2y+2/5=4 2/5

Subtract 2/5 from each side

1/2y+2/5-2/5=4 2/5-2/5

1/2 y = 4

Multiply each side by 2

1/2y *2 = 4*2

y = 8

3 0

3 years ago

Someone Please Help Me On This

luda_lava [24]

1) 18
2) 4
3) 27
4) 9
5) x=8
6) x=6

8 0

2 years ago

What 5+10 15 12 19 5

Yuliya22 [10]

Answer:

just add 10 plus 5

7 0

2 years ago

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Select each equation which is equivalent to 60% of 25.

loris [4]

Answer:

0.6 x 25 = x

Step-by-step explanation:

60% of 25

= 60/100 x 25

= 0.6 x 25

= 15

Though the question states as in a "select-all question," Only answer 0.6 x 25 = x will be correct.

8 0

3 years ago

Read 2 more answers