1 year ago

Find BC. Round the answer to the nearest tenth. A. 1.1 B. 1.9 C. 2.3 D. 2.8

Mathematics

1 answer:

Katyanochek1 [597]1 year ago

4 0

Answer:

A:1.1 I had the same answer

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There are 87 first graders in after care.after 39 students are picked up, the teacher put the remaining students into 4 groups f

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There are 12 students in each group

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The expression is 5x - 2y
Use PEMDAS and work out the rest
x = 3 and y = 4
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Part of the proceeds from a garage sale was $470 worth of $10 and $20 bills. If there were 14 more $10 bills than $20 bills, fin

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There are 25 $10 bills and 11 $20 bills.

Step-by-step explanation:

Given,

Worth of proceeds from garage = $470

Let,

x be the number of $10 bills

y be the number of $20 bills.

According to given situation;

10x+20y=470 Eqn 1

x = y+14 Eqn 2

Putting value of x from Eqn 2 in Eqn 1

$10(y+14)+20y=470\\10y+140+20y=470\\30y=470-140\\30y=330$

Dividing both sides by 30

$\frac{30y}{30}=\frac{330}{30}\\y=11$

Putting y=11 in Eqn 2

$x=11+14\\x=25$

There are 25 $10 bills and 11 $20 bills.

Keywords: linear equation, substitution method

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