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3 years ago

Need help solving this precalculus question. Will mark brainliest

Mathematics

1 answer:

LuckyWell [14K]3 years ago

5 0

The answer is -5/4
If you want the steps, just ask me in the comments. I hope this helps!

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My brother is currently three times as old as me, but in five years, my brother

wolverine [178]

Answer: Your brother is 15 years old right now.

Step-by-step explanation:

Let be "m" your currently age and "b" your brother's currently age.

Knowing that right now he is three times (this indicates multiplication) as old as you, you can write the following equation:

$b=3m$

In five years your age will be:

$m+5$

And your brother's age will be:

$b+5$

Then, if in five years, your brother will be twice as old as you, you can set up the second equation:

$b+5=2(m+5)$

Then, the System of equations is:

$\left \{ {{b=3m} \atop {b+5=2(m+5)}} \right.$

Apply the Substitution method and substitute the first equation into the second one and solve for "m":

$3m+5=2(m+5)\\\\3m+5=2m+10\\\\m=10-5\\\\m=5$

Substitute the value of "m" into the first equation and evaluate in order to find "b":

$b=3(5)\\\\b=15$

4 0

3 years ago

How to find the area of irregular figures

Cloud [144]

Instead, break down the shape into rectangles. Next, calculate the area of both rectangles and add them together. The area of the first rectangle is 72 square centimeters and the area of the second rectangle is 50 square centimeters. Together there are 72 + 50 = 122 square centimeters.

That is how u find a irregular figure..hope this help u

3 0

3 years ago

The graph below could be the graph of which exponential function

Artist 52 [7]

Answer:

Step-by-step explanation:

3 0

2 years ago

Choose the answer that correctly solves the equation: 6 x 4 + 3 = ?

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

because 6×4 is 24 and 24+3 =27

4 0

2 years ago

Read 2 more answers

A recipe for fruit punch calls for 8 cups of Sprite for every 12 cups of fruit juice. Which equation can be used to find x, the

Nikolay [14]

Answer:

It would be 1/3

Step-by-step explanation:

3 0

3 years ago