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3 years ago

(multiple ansewrs)

Mathematics

1 answer:

Bingel [31]3 years ago

4 0

Answer:

Step-by-step explanation:

because

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3 years ago

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3 years ago

Solve the system below using elimination {5x+9y= -10} {7x+10y= -1}

bixtya [17]

∑Hey , jillianwagler ⊃

Answer:

x = 7, y = -5

Step-by-step explanation:

Given~:

Solve the system below using elimination

{5x+9y= -10}

{7x+10y= -1}

Solve:

$\begin{bmatrix}5x+9y=-10\\ 7x+10y=-1\end{bmatrix}$

Isolate x ( 5x + 9y = -10 ) : $\mathrm{x=\frac{-10-9y}{5}}$

Substitute: $\mathrm{x=\frac{-10-9y}{5}}$

$\begin{bmatrix}7\cdot \frac{-10-9y}{5}+10y=-1\end{bmatrix}$

$\begin{bmatrix}\frac{-70-13y}{5}=-1\end{bmatrix}$

Isolate y : $\frac{-70-13y}{5}=1:y=-5$

Substitute: $y=-5$

$x=\frac{-10-9\left(-5\right)}{5}=7$

Hence, $x=7$

Therefore, the solution for $\begin{bmatrix}5x+9y=-10\\ 7x+10y=-1\end{bmatrix}$ are:

$x=7,\:y=-5$

xcookiex12

8/19/2022

6 0

2 years ago

If each slab of butter is one cup, and you want to double a recipe that calls for 1 and 2/3 cups of butter, how many slabs of bu

ycow [4]

Answer:

$1\frac{2}{3}\ slabs$

Step-by-step explanation:

Let

x -----> the number of slabs of butter

y ----> the number of cups of butter

we know that

The ratio is

$\frac{x}{y} =\frac{1}{1}$

$x=y$

That means-----> The number of slabs of butter must be equal to the number of cups of butter

In this problem

we have

$y=1\frac{2}{3}\ cups$

Remember that

$x=y$

The number of slabs of butter needed must be equal to the number of cups of butter

therefore

$x=1\frac{2}{3}\ slabs$

8 0

3 years ago