MATHEMATICS MIDDLE SCHOOL

Which description is paired with its correct expression?

Answers

Answer 1

Answer:

Answer:

A number is twice as much when put added by 4 to equal 12

2x+4=12

Step-by-step explanation:

Answer 2

Answer:

Answer:

The answet is C.

Step-by-step explanation:

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How do you write 8.638 in word form

Answers

Eight and six-hundred thirty eight thousandths.

Hope that helps :)

Eight and six hundred thirty eight thousandths

The expression 12g gives the number of kilometers a car can travel using g liters of gasoline. How far can this car travel on 5 1/2 liters of gasoline?

Answers

Answer:

66 km

Step-by-step explanation:

Given that

Number of km's traveled by a car using g liters of gasoline = 12g

Number of gallons of gas required to travel 12g kilometers = g

We have to find

How far this car can travel using $5 (1)/(2)$ or 5.5 liters of gasoline = x= ?

Now we can find this by substituting g= $5 (1)/(2)$ in the the above equation representing number of kilometers traveled by the car.

Number of km's traveled by a car using $5 (1)/(2)$ liters of gasoline = 12 ( $5 (1)/(2)$ )

x = 12 (5.5)

x= 66 km

So, the car travels 66km in 5.5 liters of gasoline

Substitute in 5 1/2 for g in the expression : 12g=12(5 1/2)=66

So, this car can go 66 kilometers on 5 1/2 liters of gasoline.

A car travels at 65 miles per hour. Going through construction, it travels at 3/5 this speed. Write this fraction as a decimal and find the speed.

Answers

Answer:

Speed = 39. 0 miles per hour.

Step-by-step explanation:

Given : A car travels at 65 miles per hour. Going through construction, it travels at 3/5 this speed.

To find : Write this fraction as a decimal and find the speed.

Solution : We have given

A car travels in 1 hour = 65 miles .

Speed = $(distance)/(time)$ .

Speed = $(65)/(1)$

Speed = 65 miles per hour .

According to question :

It travel $(3)/(5)$ of the speed.

To convert fraction in to decimal .

$(3)/(5)$ = 0.6

So, it travel 0.6 of speed .

Speed = 0.6 * 65 .

Speed = 39. 0 miles per hour.

Therefore, Speed = 39. 0 miles per hour.

3/5 = 60/100 = 0.6

65
x 60
= 00
3900

3900 / 100 = 39.

While going through construction, the car travels at 39mph.

Emma buys and sells truck parts. She bought two tires for $35 each and later sold them for $65 each. She bought three rims for $75 each and later sold them for $136 each. She bought five headlight covers for four dollars each and later sold them for $15 each what is Emma’s total profit