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Olenka [21]
2 years ago
9

Please help ill mark brainliest​

Mathematics
1 answer:
const2013 [10]2 years ago
3 0

= 60

( i dont know how to explain it , to many steps lol :3)

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Simplify the expression by combining like terms2a + 3b + 5 + 10 + 4b + 6b
Anastaziya [24]

Expression:

2a+3b+5+10+4b+6a

We can add just the terms that are similar, as follows:

=(2a+6a)+(3b+4b)+(5+10)

Simplifying:

=8a+7b+15

Answer: B.

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1) Dwight makes 7 out of 10 free throw shots. Based on this information, how many
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8 0
3 years ago
Q26. Division A has 15 students and division B has 20 students. Average score of students in division A is greater by 2 as compa
Romashka [77]

Step-by-step explanation:

Let a be the total score of Div. A

Let b be the total score of Div. B

given,

\frac{a}{15}  -  \frac{b}{20}  = 2

as equation 1.

and

b - a = 160 \\  - a + b = 160

as equation 2.

Now multiply equation 2 by 1/20 to eliminate b to solve for a.

( - a)( \frac{1}{20} ) + (b)( \frac{1}{20} )  = ( \frac{1}{20} )(160) \\  -  \frac{a}{20}  +  \frac{b}{20}  = 8

take this new equation as equation 3.

now we will use equation 1 + equation 3 to eliminate b to solve for a.

( \frac{a}{15}  + ( -  \frac{a}{20} )) + (  - \frac{b}{20}  +  \frac{b}{20} ) = 2  +  8 \\  \frac{a}{60}  =  10 \\ a = 60 \times 10 \\  = 600

Div.A total score = 600

Average Score = Total Score / Number of students.

\frac{600}{15}  \\  = 40

3 0
3 years ago
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