MATHEMATICS MIDDLE SCHOOL

the line plot below displays the amount of time cars were parked outside a bakery if the total amount of time for a divided equally among all the cars, how long would each car have been parked

Answers

Answer 1

Answer:

Answer:

10 are 3/4 hr

4 are 1/2 hr

2 are 1/4 hr

Step-by-step explanation: we took 3/4 and multiplied x 10/1 = 30/4

we multiplied 1/2 x 4/1 =4/2 and we multiplied 1/4 x 2/1= 2/4

I converted 4/2 x 2/2 to give it the same common denominator as the other fractions 4/2 x 2/2=8/4

So 8/4 +30/4+2/4 = 40/4 divide this by 16 ( total number of cars) But somehow I am not getting the answer of 5/8, 9/16, 3/4 or 1/2 that are to choose from for the answer. 40/4 = 10 and 10/16 is simplified by dividing by 2/2 = 5/8

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Subtract 3a^2+5ab−4b^2 from 8a^2−6ab+4b^2

Answers

Answer:

$\large\boxed{(8a^2-6ab+4b^2)-(3a^2+5ab-4b^2)=5a^2-11ab+8b^2}$

Step-by-step explanation:

$(8a^2-6ab+4b^2)-(3a^2+5ab-4b^2)\n\n=8a^2-6ab+4b^2-3a^2-5ab-(-4b^2)\n\n=8a^2-6ab+4b^2-3a^2-5ab+4b^2\qquad\text{combine like terms}\n\n=(8a^2-3a^2)+(-6ab-5ab)+(4b^2+4b^2)\n\n=5a^2-11ab+8b^2$

A basketball has a diameter of 9.5cm.

Which of the expressions shows how to determine the volume of air the basketball can hold?

A
34π(4.75)3

B
34π(9.5)3

C
43π(4.75)3

D
43π(

Answers

Answer:

C. $(4)/(3)\pi\cdot(4.75)^3\ cm^3$

Step-by-step explanation:

The volume of the ball with radius R can be calculated using formula

$V=(4)/(3)\pi R^3$

A basketball has a diameter of 9.5 cm, so its radius is

$R=(D)/(2)=(9.5)/(2)=4.75\ cm$

Hence, the volume of air the basketball can hold is

$V=(4)/(3)\pi\cdot(4.75)^3\ cm^3$

Answer:

I also think it's 4/3 ( 4.75 ) 3

Which symbol gives you more information about two numerical expression

Answers

The symbol that gives you more information about two numerical expression is multiplication.

darnell's car used 8 gallons of gasoline to travel 340 miles. after a mechanic work on teh car, it used 7 gallons of gasoline to travel 350 miles. if the price of gasoline was approximately $4.00 per gallon, how much less to the nearest cent per mile, did it cost to run the car after the mechanic worked on it?

Answers

What we are going to do for this case is find the cost for each case:
Cost to run the car before the mechanic worked on it:
$(4) * (8) = 32 dollars (32) * (1/340) = 0.09 dollars / mile$
Cost to run the car after the mechanic worked on it:
$(4) * (7) = 28 dollars (28) * (1/350) = 0.08 dollars / mile$
The difference between both cases is:
$0.09 - 0.08 = 0.01 dollars / mile$
Answer:
It cost to run the car after the mechanic worked on it 0.01 $ / mile less than before the mechanic worked on it.

Write an equation of the line that passes through the points (0,7),(6,10)

Answers

the answer in slope intercept form is y=1/2x+7

2 fifths of a number is 14. what is the number?

Answers

In math

"of" means times (x)
"is" means equals (=)
"a number" is your unknown which you can call anything but we'll call x

2/5 of a number is 14

Translation...

2/5 * x = 14

Divide each side by 2/5 to isolate x. To divide a fraction, multiply the reciprocal of the divisor (flip the numerator and denominator).

x = 14 * 5/2
x = 70/2
x = 35

2/5 of 35 is 14.

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