2 years ago

The area of triangle ABC is _____. A 60 B65 C130 D150

Mathematics

1 answer:

Romashka [77]2 years ago

7 0

Is there a picture that goes with the question ?

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If angle∠ A and angle∠ B are supplementary angles and angle∠ A is eighteight times as large as angle∠ B, find the measures of a

Shalnov [3]

A = 8B
A + B = 180
8B + B = 180
9B = 180
B = 20
A = 8 * 20 = 160

4 0

2 years ago

A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 70% pure anti

andre [41]

Answer:

First brand of antifreeze: 21 gallons

Second brand of antifreeze: 9 gallons

Step-by-step explanation:

Let's call A the amount of first brand of antifreeze. 20% pure antifreeze

Let's call B the amount of second brand of antifreeze. 70% pure antifreeze

The resulting mixture should have 35% pure antifreeze, and 30 gallons.

Then we know that the total amount of mixture will be:

$A + B = 30$

Then the total amount of pure antifreeze in the mixture will be:

$0.2A + 0.7B = 0.35 * 30$

$0.2A + 0.7B = 10.5$

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:

$-0.7A -0.7B = -0.7*30$

$-0.7A -0.7B = -21$

$0.2A + 0.7B = 10.5$

--------------------------------------

$-0.5A = -10.5$

$A = \frac{-10.5}{-0.5}$

$A = 21\ gallons$

We substitute the value of A into one of the two equations and solve for B.

$21 + B = 30$

$B = 9\ gallons$

3 0

2 years ago

In order to find constant rate, you need to use change in y ÷ change in x right?

NemiM [27]

Yes u have to and as long are you do than you would be right

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2 years ago

What is 50×10 plz help me

AveGali [126]

The answer is for the problem is 500

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2 years ago

Read 2 more answers

What is the solution to this equation -13x=52

Tom [10]

Answer:

-4

Step-by-step explanation:

You multiply -13*-4=52

8 0

2 years ago