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3 years ago

Can you explain to me (detailed) on how to do this problem? I will give you a brainly if you get this right.

Mathematics

2 answers:

Vladimir [108]3 years ago

8 0

Answer:

70in^2

Step-by-step explanation:

width x height

so in this case it would be 10in x 7in

Tasya [4]3 years ago

5 0

Answer:

The answer is 70 in.

Step-by-step explanation:

To find the area of a rectangle, you have to multiply the length (in this case it's 10) and the witdh (7)

10 x 7 = 70

Thus the answer, 70.

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Gnoma [55]

Answer:

your mom

Step-by-step explanation:

3 0

3 years ago

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.

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

5 0

3 years ago

There are 134 third graders and 167 fourth graders at the annual school and family picnic. the number of students is 7 times the

grandymaker [24]

I got 39 tables.
134+167=301
301/7=43
Total amount of people =344
344/9=38.222 which you would round to 39 tables

4 0

3 years ago

What is another way to write this number 300+70+1/5+8/100

barxatty [35]

Answer:

370.28

Step-by-step explanation:

you add the two whole numbers then you add the two fractions and make them a decimal after that put it all together and u get the answer

3 0

3 years ago

Will give brainliest!

hram777 [196]

Answer:

Step-by-step explanation:

multiply 0.83 by 0.06 = 0.0498

multiply 0.17 by 0.52 and add that to the first one

which gives you the prob of winning of 0.1382

6 0

3 years ago