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1 answer:

7 0

Answer:
3 postcards

Explanation:
So the question says that Brenna bought 4 packs of 12 postcards, which is the same as 4x12.

4x12=48, so Brenna bought 48 postcards.

It says that she only needed 45, so we can subtract 45 from 48.

48-45=3

Brenna had three postcards left over.

Hope this helped you!

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Find the sum of -2x+5x-7 and -3x-4x-6

scoray [572]

Answer:

-4x-13

Step-by-step explanation:

To figure out the sum, you have to add like terms.

This is how it would look like:

$-2x + 5x - 3x - 4x -7 - 6\\=3x - 3x - 4x - 13\\= -4x - 13$

8 0

4 years ago

Compare - 3.5 and - 3. Use <, >, or =. -3.5 = -31 -3.5 < - 3 - -3.5> -3

shusha [124]

Answer:

-3.5 < -3

Step-by-step explanation:

-3 is greater than -3.5

8 0

3 years ago

If a=2, b=3 and c=4 then find the numerical value of a2+2abc+b2+c2

qaws [65]

a=2 b=3 and c=4. then,

a2+2abc+b2+c2

a2+2abc+b2+c2= 2^2+2×2×3×4+3^2+4^2

(replace value of a, b, c by2,3,4 respectively tgen solve)

= 4+48+9+16

= 77………………

Therefore, 77 is correct answer.

7 0

3 years ago

Initially a pool contains 350 gallons of water. A hose is placed in the pool and the water is turned on. The hose adds 5.2 gallo

quester [9]

The amount of water that is turned in a minute is 5.2d. Given the fact that initially was 350 gallons of water everything you pour needs to be added to the initial amount. So the answer is V(x) = 350+5.2x (D). I hope that this is the answer that you were looking for and it has helped you.

6 0

4 years ago

Read 2 more answers

Calculate the force of gravity on earth of an object that has a mass of 200 kg.

ElenaW [278]

Gravity= 9.8 × 200 =1960N

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3 years ago