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3 years ago

What is the answer to 5x-7=13

Mathematics

2 answers:

liubo4ka [24]3 years ago

3 0

Answer:

x=4

Step-by-step explanation:

NemiM [27]3 years ago

3 0

Answer: x=4

Step-by-step explanation:

problem: 5x-7+13

step 1: add 7 to both sides

5x=20

step 2: divide both sides by 5

5x/5+20/5

step 3: simplify

x=4

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ivann1987 [24]

Answer:

5.6 x 5.6 x 6.16 x 6.16=1190

Step-by-step explanation:

5.6 x 5.6 x 6.16 x 6.16=1189.974016

Rounded up will be 1190.

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3 years ago

1. What are transition metals?

aliya0001 [1]

Answer:

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Step-by-step explanation:

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3 years ago

Express 9.25. as a fraction in its simplest form<br>

Olenka [21]

Answer:

9 1/4

Step-by-step explanation:

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2 years ago

1/6×2/3<br> show me how to do it

hodyreva [135]

Multiple 6 with 3 and 1 with 2
2/18 = 19

7 0

3 years ago

Use Cramer's Rule to solve the following system: –2x – 6y = –26 5x + 2y = 13

andriy [413]

$\bf \begin{cases}
-2x-6y&=-26\\
\quad 5x+2y&=13
\end{cases}\stackrel{\textit{determinant of the coefficients}}{D=
\begin{bmatrix}
-2&-6\\5&2
\end{bmatrix}}\implies (-4)-(-30)
\\\\\\
D=-4+30\implies \boxed{D=26}\\\\
-------------------------------\\\\$

$\bf x=\cfrac{D_x}{D}\implies x=\cfrac{
\begin{bmatrix}
\boxed{-26}&-6\\\\ \boxed{13}&2
\end{bmatrix}}{D}\implies x=\cfrac{(-52)-(-78)}{26}
\\\\\\
x=\cfrac{-52+78}{26}\implies x=\cfrac{26}{26}\implies \boxed{x=1}\\\\
-------------------------------\\\\
y=\cfrac{D_y}{D}\implies y=\cfrac{
\begin{bmatrix}
-2&\boxed{-26}\\\\ 5&\boxed{13}
\end{bmatrix}}{D}\implies y=\cfrac{(-26)-(-130)}{26}
\\\\\\
y=\cfrac{-26+130}{26}\implies y=\cfrac{104}{26}\implies \boxed{y=4}$

4 0

3 years ago