All categories

2 years ago

(help me) Which is the correct operation to use to solve this problem?

Mathematics

1 answer:

antoniya [11.8K]2 years ago

4 0

D 1,020÷15=68 (that's the equation and the answer)

You might be interested in

Point HH is located at (4,-2)(4,−2) on the coordinate plane. Point HH is reflected over the yy-axis to create point H'H ′ . Poin

marin [14]

Answer: Coordinates of H : (−4,2)

4 0

2 years ago

Scott bought a pen and received change of $4.75 in 25 coins, all dimes and quarters. How many of each kind did he receive?

dangina [55]

Answer:

He received 10 dimes and 15 quarters.

Step-by-step explanation:

Dimes = $0.10

Quarters = $0.25

Variable x = dimes

Variable y = quarters

Create a pair of linear equations:

0.10x + 0.25y = 4.75

x + y = 25

Isolate any variable, using an equation of your choice:

x + y = 25

x = 25 - y

Plug in this new value of x into the other equation:

0.10(25 - y) + 0.25y = 4.75

Use the distributive property:

2.5 - 0.10y + 0.25y = 4.75

Combine like terms:

2.5 + 0.15y = 4.75

Isolate variable y:

0.15y = 2.25

y = 15

Plug in the value of y into any equation:

x + y = 25

x + 15 = 25

Isolate variable x:

x = 10

7 0

2 years ago

10 POINTS ! PLEASE HELP !

ratelena [41]

The answer would be B

5 0

2 years ago

Read 2 more answers

Related rates(calculus)

telo118 [61]

Answer:

The volume increases at a rate of $125663.71 mm^ 3 / s$

Step-by-step explanation:

The rate of change of the radius with respect to time is 4 mm / s.

So:

$\frac{dr}{dt} = 4mm / s$

Now we must find a relationship between the volume of a sphere and its radius.

The equation of the volume of a sphere is:

$V = \frac{4}{3}\pi r^ 3$

So:

$\frac{dV}{dt} = \frac{4}{3}\pi * 3r ^ 2 * \frac{dr}{dt}\\\frac{dV}{dt} = 4\pi r ^ 2 * 4\\\frac{dV}{dt} = 16\pi r ^ 2$

The diameter of the sphere is 100 mm. Therefore its radius is 100/2 = 50 mm.

So:

$\frac{dV}{dt} = 16\pi (50) ^ 2\\\frac{dV}{dt} = 40000\pi mm^3 / s$

The volume increases at a rate of :

40000 π mm ^ 3 / s = 125663.71 mm^3/s

7 0

3 years ago

your car travels 308 miles on 11 gallons of gasoline. how many miles can it travel with 1 gallon of gas

Monica [59]

Answer:

28 miles

Step-by-step explanation:

308/11 = 28 miles per gallon of gas

5 0

2 years ago