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trasher [3.6K]
3 years ago
7

Can someone help me please?

Mathematics
1 answer:
sergiy2304 [10]3 years ago
8 0

Answer:

6.5

Step-by-step explanation:

43.50-24=19.5

19.5/3=6.5

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Solve the following system of equations for a and for b:
viktelen [127]

Answer:

a=3\\b=1

Step-by-step explanation:

9a+3b=30\\8a+4b=28

Let's solve the second equation for a to later on replace it in the first equation.

8a+4b=28\\8a=28-4b\\a=\frac{28-4b}{8}

Now plug this into the first equation.

9a+3b=30\\9(\frac{28-4b}{8})+3b=30

Distribute the 9

(\frac{252-36b}{8}) +3b=30

Break down the fraction.

\frac{252}{8}-\frac{36b}{8}+3b=30

Simplify.

\frac{63}{2}-\frac{9}{2}b+3b=30

Subtract \frac{63}{2}

-\frac{9}{2}b+3b=30-\frac{63}{2}

Combine like terms.

\frac{-9+2*3}{2}b=\frac{30*2-63}{2}

\frac{-9+6}{2}b=\frac{60-63}{2}

\frac{-3}{2}b=\frac{-3}{2}

Muliply by the reciprocal or inverted fraction next to b.

(-\frac{2}{3})(-\frac{3}{2}) b=-\frac{3}{2}(-\frac{2}{3})

b=1

Now plug this value into any of the equations to find the value of a.

8a+4b=28\\8a+4(1)=28\\8a+4=28\\8a=28-4\\8a=24\\a=\frac{24}{8}\\ a=3

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4 years ago
Why do the kindergartener take her books to the zoo?
SpyIntel [72]
Probably because their teacher asked them or if they did something bad they would probably have to sit and read.
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4 years ago
Dan can ride his skateboard 2 miles in 10 minutes. How many miles can he ride his skateboard in 30 minutes?
lisabon 2012 [21]

Answer:

6

Step-by-step explanation:

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3 years ago
The image below shows one of the walls of a house in the shape of a trapezoid. What is the total area of the wall?
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I believe the answer to your question will be C. Hope this helps :)
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3 years ago
Read 2 more answers
Your friend incorrectly says that point A and point B represent opposite integers. What is the opposite of the integer represent
Goryan [66]

Looking at the graph of the functions, the opposite of the integer represented by point​ A is 1/10.

My ​ friend's error is that he fail to recognize that the value of Point A is different from Point b on the graph.

<h3>What is opposite integers?</h3>

This is known to be the a term that connote a pair of opposite integers which have the negative and positive aspect of a number altogether.

Note that  , 4 and -4 are a pair of opposite integers. So,, we can call them opposites due to the fact that they are on the opposite sides of the number line

From the graph attached, you can see that they are not pair because the values of Point B is more than that of Point A because Point A is at one step from 5 while point B is at 2 steps from 5.

Therefore, Looking at the graph of the functions, the opposite of the integer represented by point​ A is 1/10. My ​ friend's error is that he fail to recognize that the value of Point A is different from Point b on the graph.

Learn more about opposite integers from

brainly.com/question/10785433

#SPJ1

5 0
2 years ago
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