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3 years ago

Rewrite in simplest terms: -3(s – 10) + 7(-2s – 1)

Mathematics

2 answers:

Inessa05 [86]3 years ago

6 0

Answer:

$-17s + 23$

Step-by-step explanation:

$- 3(s - 10) + 7( - 2s - 1)$

$- 3(s - 10) = - 3s - 3 \times ( - 10)$

$- 3s + 30 + 7( - 2s - 1)$

$- 3s + 30 - 14s - 7$

$- 17s + 30 - 7$

$\boxed{\green{= - 17s + 23}}$

erik [133]3 years ago

5 0

-3(s-10)+7(-2s-1)

-3s+30+(-14s-7)

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4 years ago

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3 years ago

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Brandon has a jar of quarters and dimes with a total value of $10.05. The number of quarters is 3

Hunter-Best [27]

Answer:

Brandon has 18 Dimes and 33 Quarters [Beware: The problem does not state that Brandon owns the coins - he just has them. Check your pockets]

Step-by-step explanation:

Let D and Q stand for the numbers of Dimes(D) and Quarters(Q). I'll use pennies instead of dollars, so avoid the clutter of decimal points.

We are told that:

Q = 2D - 3 [The number of quarters is 3 less than twice the number of dimes.]

and

25Q + 10D = 1005 [total value of $10.05]

Substitute the value of Q in the first equation in the second, so that we have an equation with just one unknown, D.

25(2D-3) + 10D = 1005

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D = 18

Q = 2D - 3

Q = 2(18) - 3

Q = 33

=============================

Check

25Q + 10D = 1005

25(33) + 10(18) = 1005 ?

825 + 180 = 1005 YES

----

Q = 2D - 3 ?

33 = 2(18) - 3 YES

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2 years ago

Your lunch in the hospital cafeteria cost $6.50. Based on working 50 weeks per year, how much will you spend on lunch per year?

s344n2d4d5 [400]

The total amount spent on lunch per year would be 325 dollars.

<h3>What is the fundamental principle of multiplication?</h3>

Multiplication is the mathematical operation that is used to determine the product of two or more numbers. If an event can occur in m different ways and if following it, a second event can occur in n different ways, then the two events in succession can occur in m × n different ways.

We have been given that Your lunch in the hospital cafeteria cost $6.50. Based on working 50 weeks per year, then;

The lunch in the hospital cafeteria cost = $6.50.

The total amount spend on lunch per year;

6.50 x 50

325

Hence, the total amount spent on lunch per year would be 325 dollars.

Learn more about multiplications;

brainly.com/question/14059007

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2 years ago