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3 years ago

Please help with my algebra homework and explain if you can

Mathematics

1 answer:

IRINA_888 [86]3 years ago

4 0

$A= \frac{1}{2} h (x+y)$

we have to solve for x , solving for x means , we have to isolate x one one side , by shifting all other variables to other side

$A= \frac{1}{2} h (x+y)$

Multiply both sides by 2

2A = h(x+y)

Divide both sides by h

2A/h = x+y

Subtract y from both sides

$\frac{2A}{h} -y =x$

$x=\frac{2A}{h} -y$

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The sum of 9 and twice a number

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3 years ago

Which fact would help you to solve for x in the diagram shown?

Gnoma [55]

Answer:

(A) Angles in equilateral triangle are congruent

Step-by-step explanation:

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Therefore, Using the property that Angles in equilateral triangle are congruent, we can find the value of x.

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3 years ago

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mr_godi [17]

Answer:

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3 years ago

32. Which side of the triangle in the diagram is the hypotenuse? A. X B. Y C. Z

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8 0

3 years ago

Read 2 more answers

Solve the system of equations by using substitution. x+8y=-2 x-3y=20

zysi [14]

Answer:

(14, -2)

Step-by-step explanation:

To solve by using substitution, begin by solving for a variable in the first equation. Let's solve for x:

$x+8y=-2\\x=-2-8y$

Now we know what x equals. Let's substitute this into the second equation:

$x-3y=20\\(-2-8y)-3y=20$

We can then simplify:

$-2-8y-3y=20$ Given equation

$-2-11y=20$ Combine y terms

$-11y=22$ Add 2

$y=-2$ Divide by -11

So, we now know the value of y = -2.

To find the value of X, we can substitute the value of Y into one of the equations. Let's use the first one:

$x+8y=-2$

$x+8(-2)=-2$ Substitute for y

$x-16=-2$ Distribute 8

$x=14$ Add 16

So, we now know the value of x = 14.

Therefore, we know a solution to the system of equations is (14, -2).

4 0

3 years ago