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3 years ago

10

Whats 21/30 in simplest form

1 answer:

Vlada [557]3 years ago

7 0

7/10 cause you divide both by three

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What is the process to get 90 divided by 40

lorasvet [3.4K]

$\frac{90}{40} = \frac{9*10}{4*10} = \frac{9}{4} = 2.25$

7 0

3 years ago

Using compatible number to estimate the quotient 2116÷7

DerKrebs [107]

Answer:

302

Step-by-step explanation:

7 goes into 21 3 times, so the first digit of the quotient is 3. There's no remainder. Bringing down the second "1," we find this indivisible by 7, and so bring down the 6.Thus, Remember that 7 goes into 14 2 times. Thus, a good estimate would be 302.

3 0

3 years ago

During the cold winter months, a sheet of ice covers a lake near the arctic circle. At the beginning of spring, the ice starts t

Digiron [165]

Answer: 1.5 meters.

Step-by-step explanation:

Given: At the beginning of spring, the ice starts to melt.

The variable s models the ice sheets thickness in meters t weeks after the beginning of spring.

$s=-0.25t+4$

At t=0, s=4 meters

At t=1, s=3.75 meters

∴It is a linear equation, where the rate of change in thickness = 3.75-4=0.25 meter per minute .

The decrease in ice sheet in every 6 weeks = $6\times\text{rate of decrease}=6\times0.25=1.5\ meters$

5 0

3 years ago

Find the surface area

Semmy [17]

Answer:

The surface area is $198.75\ ft^2$

Step-by-step explanation:

<u>Step 1: Determine the area of the bottom</u>

$A = s^2$

$A = (7.5\ ft)^2$

$A = 56.25\ ft^2$

<u>Step 2: Determine the area of the triangles</u>

$A = \frac{h * b}{2}$

$A = \frac{9.5\ ft * \frac{7.5\ ft}{2}}{2}$

$A=\frac{9.5\ ft*3.75\ ft}{2}$

$A = 17.8125\ ft^2$

There are two of these right triangles on every side which means that we have 8 of these triangles so we multiply the area that we got by 8.

$A = 17.8125\ ft^2 * 8$

$A=142.5\ ft^2$

<u>Step 3: Combine the area to get the surface area</u>

$A_{total}=56.25\ ft^2+142.5\ ft^2$

$A_{total}=198.75\ ft^2$

Answer: The surface area is $198.75\ ft^2$

6 0

3 years ago

REALLY NEED HELP: given that (-5,-2) is on the graph of f(x) find the corresponding point for the function 2f(x)

laiz [17]

we are given

point for f(x) is (-5,-2)

Whenever we need to find point for a*f(x) , we will multiply a by y-value

Here , we have 2f(x)

so, we will multiply 2 units to y-value

y-value is -2

new y-value will be 2*-2=-4

so,

point for 2f(x) will be (-5,-4)........Answer

6 0

3 years ago

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