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4 years ago

Milley wants to solve the following equations using the method of elimination:

1 answer:

3 0

She should multiply y = x - 2 by -4...that way one x will be -4x and the other will be 4x and they will cancel out when added.

answer is -4

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Help me on number problem 1

ivann1987 [24]

Answer:

Alright well you still need to use the slope formula to find the slope m

m = 3 Hope this helps :)

Step-by-step explanation:

4 0

3 years ago

The base of a triangle exceeds the height by 7 centimeters. If the area is 400 square centimeters, find the length of the base a

zvonat [6]

Answer:

Base = 32 cm

Height = 25 cm

Step-by-step explanation:

Area of a triangle can be calculated as:

$Area = \frac{1}{2}\times Base \times Height$

We are given that the base of triangle exceeds the height by 7 cm. This can be expressed in an equation form as:

Base = Height + 7

Lets use B to represent base and H to represent height

B = H + 7

The equation of area can be stated as:

$Area=\frac{1}{2}bh\\\\ Area=\frac{1}{2}(h+7)(h)\\\\ 400=\frac{1}{2}h(h+7)\\\\ 800=h^{2}+7h\\\\ h^{2}+7h-800=0$

This is a quadratic equation which can be solved using a quadratic equation as shown below:

$h=\frac{-7+-\sqrt{49-4(1)(-800)} }{2(1)} \\\\ h=\frac{-7+-57}{2}\\\\h=-32,25$

Since the height cannot be negative, we'll consider the positive value only i.e height is equal to 25 cm.

Therefore, the length of base will be 25 + 7 = 32 cm.

8 0

4 years ago

A bookstore bought a case of 10 books at a wholesale price of $84. The bookstore will sell the books at a 25 percent markup, and

Nata [24]

All you have to do is multiply 84 by 25%

And that's your answer.

I hope this helped

4 0

4 years ago

Read 2 more answers

Which function has a greater rate of change

kati45 [8]

Answer:

A has a rate of change of -5 and is greater than Bs -4.5

7 0

3 years ago

Plz help me!!!!!!!!!!!!!

tigry1 [53]

If the formula is a+b-c then you need to substitute the letters with the numbers. For this equation the formula would be:
(1+3-4) + (2+5-6)
(4-4) + (7-6)
0 + 1
=1
The answer would be 1

4 0

3 years ago

Read 2 more answers