Explain 2 ways to evaluate 15(90-3)

Mathematics

2 answers:

Elena L [17]3 years ago

8 0

Distribute the 15 first or subtract inside the parentheses first and then multiply

pychu [463]3 years ago

5 0

First Way:

15(90-3)

=15(10*9-3)

=15*10*9-15*3

=150*9-45

=1,350-45

=1,305

-----------------

Second Way:

15(90-3)

=15(87)

=15(80+7)

=15(10*8+7)

=15*10*8+15*7

=150*8+(10+5)*7

=1,200+70+35

=1,200+105

=1,305

You might be interested in

Find the slope of the line that passes through the given points.<br> (-3,-3) and (4.-6)

Nastasia [14]

Answer: y= -3/7x - 30/7

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Which is a solution to the equatin 5x+2y=9

Tanya [424]

Step by step

5x+2y=9

Move variable to the right side and change
It’s side.

5x=9-2y

Divide both sides of the equation by 5

X = 9/5 - 2/5y

Final solution

Answer: x = 9/5 - 2/5y

4 0

3 years ago

CAN SOMEONE HELP ME IN ALGEBRA PLEASE!

Reptile [31]

19,7,and 61 im not sure about the last one

8 0

3 years ago

The vertex of the parabola below is at the point (1, -2). Which of the following

Minchanka [31]

Answer:

A. $y=\left(x-1\right)^{2}-5$

Step-by-step explanation:

I graphed my answer on the graph below and it matches your graph.

4 0

3 years ago

A Genesse High School, the Sophomore class has 60 more students than the Freshmen class. The junior class has 50 fewer students

alexira [117]

1427 = (F) (+ F + 60) (2F - 50) (+ 3F)
<em>Each pair of brackets represents one of the classes - F meaning Freshmen Class. It has been split into brackets for demonstrational purposes - nothing is being multiplied.</em>
F is an unknown number and each other class size is based off of that so we put it in algebraic terms in order to work it out.
1 - Freshmen Class
2 - Sophomore Class (Freshmen Class + 60 more students)
3 - Junior Class ( Twice the size of the Freshmen Class - 50 students)
4 - Senior Class (Three times the size of the Freshmen Class)

All this can be simplified to 7F + 10 = 1427
1427 - 10 = 1417
1417/7 = 202.428....

Is there a mistake in the question?

Following the question with 202 as the answer - the number 1424 is reached
If increased to 203 - 1431 is reached.
The answer shouldn't include half a person.

3 0

3 years ago