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2 years ago

-7 x (4+8) = ?? Please a aswer?

2 answers:

6 0

First parentheses.
-7 × (4+8) =
-7 × (12) =

Then Multiply.
-7 × 12 = -84

Answer is -84.

- A good tip is to follow this rule :

PEMDAS

Parentheses, exponent, Multiplication, division, addition, subtraction.

Do it in that same order and you will get your answer.

Colt1911 [192]2 years ago

5 0

The answer would be -84.

Here are the steps I did.

1. Simplify 4 + 8 to 12 ( -7 * 12 )

2. Now lastly simplify and u get -84.

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N the function y = 12.00x + 50, y represents the cost of carpet by the square yard and x represents the number of square yards.

borishaifa [10]

Answer:

The cost increase for each square of carpet by 12.

Step-by-step explanation:

The given function is

$y=12.00x+50$

It is a slope intercept form of the line

$y=mx+b$

Where m is the slope and b is y-intercept.

Therefore the slope of given function is 12 and the y-intercept is 50.

It means the initial ot fixed cost of the carpet is 50 and the cost increased by 12 for each square of carpet.

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3 years ago

Write an equation of a function with each domain:

Aliun [14]

Answer: a. $y = \sqrt{x} -2$

Step-by-step explanation:

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2 years ago

A rectangle has a perimeter of 30m. The length is 10m. Solve the following equation to find the width: 2w+ 2(10)= 30

NARA [144]

2w+2(10)=30

multioly the 2 and 10

2w+20=30

subtract 20

2w=10

divide by 2

w=5

plz rate as brainliest answer

5 0

3 years ago

Read 2 more answers

The scale on a map says that 6 cm represents 15 km. What distance on the map in centimeters represents 20 kilometers?

ale4655 [162]

Answer:

8 centimeters.

Step-by-step explanation:

$6cm\ on\ map\ -> 15km\\$

Divide 3 both sides:

$2cm\ on\ map\ -> 5km$

Multiply 4 on both sides:

$8cm\ on\ map\ -> 20km$

8cm on the map represents 20km.

4 0

3 years ago

At a high school, students can choose between three art electives, four history electives, and five computer electives. Each stu

V125BC [204]

Answer:

$\frac{^3C_1\times ^4C_1}{^{12}C_2}$

Step-by-step explanation:

Given,

Art electives = 3,

History electives = 4,

Computer electives = 5,

Total number of electives = 3 + 4 + 5 = 12,

Since, if a student chooses an art elective and a history elective,

So, the total combination of choosing an art elective and a history elective = $^3C_1\times ^4C_1$

Also, the total combination of choosing any 2 subjects out of 12 subjects = $^{12}C_2$

Hence, the probability that a student chooses an art elective and a history elective = $\frac{\text{Total combination of choosing an art elective and a history}}{\text{ Total combination of choosing any 2 subjects}}$

$=\frac{^3C_1\times ^4C_1}{^{12}C_2}$

Which is the required expression.

3 0

3 years ago

Read 2 more answers