All categories

3 years ago

Expand the expression -2.5(-3 + 4n + 8)

Mathematics

2 answers:

Anika [276]3 years ago

4 0

Answer:

2.5+7.5+-10n+-20

Step-by-step explanation:

Multiply everything on the inside by the number on the outside and put it together with addition signs.

-2.5(-3+4n+8)

-2.5*-3=7.5

-2.5(7.5+4n+8)

-2.5*4= -10

-2.5(7.5+-10n+8)

-2.5*8=-20

-2.5+7.5+-10n+-20

Aleksandr-060686 [28]3 years ago

4 0

Answer: 7.5 + 200n

Step-by-step explanation:

(-2.5 • -3) + (-2.5 • 4n) + (-2.5 • 8)

7.5 + -10n + -20

7.5 + 200n

You might be interested in

I keep coming up with different answers please help me?

allsm [11]

The answer is 1,600.

3 0

2 years ago

Read 2 more answers

a student found the volume of a rectangular pyramid with a base area of 92 square meters and a height of 54 Meters to be 4968 cu

Naya [18.7K]

It is not correct.

The student found the volume by multiplying the base area with the height. He forgot to divide it by 3.

Formula to find the volume of the pyramid = 1/3 base area x height

volume = 1/3 x 92 x 54 = 1656 square meters

6 0

3 years ago

Read 2 more answers

Between t=10 and t=60 the acceleration is 0.4 calculate the speed when t=60

Lisa [10]

Answer:

i dont understand

Step-by-step explanation:

7 0

3 years ago

A number of cats got together and decided to kill between them 999919 mice. every cat killed an equal number of mice. Each cat k

vredina [299]

Answer:

Step-by-step explanation:10,000 cats

4 0

3 years ago

Read 2 more answers

Given: ∆PQR, m∠R = 90° m∠PQR = 75° M ∈ PR , MP = 18 m∠MQR = 60° Find: RQ

tensa zangetsu [6.8K]

Answer: RQ= 8.99 ( approx)

Step-by-step explanation:

Let MR= x

Since, In triangle, PRQ, tan 75°= $\frac{18+x}{RQ}$

⇒ RQ= $\frac{18+x}{tan 75^{\circ}}$

Now, In triangle MRQ,

tan 60°= $\frac{18+x}{RQ}$

⇒ RQ= $\frac{x}{tan 60^{\circ}}$

On equating both values of RQ,

$\frac{18+x}{tan 75^{\circ}}=\frac{x}{tan 60^{\circ}}$

⇒ $\frac{18+x}{x}=\frac{tan 75^{\circ}}{tan 60^{\circ}}$

⇒ $\frac{18+x}{x}=2.15470053838$

⇒ $18=2.15470053838x-x$

⇒ $x=15.5884572681$ ≈15.60

Thus RQ=8.99999999999≈8.99

6 0

3 years ago

Expand the expression ​-2.5(-3 + 4n + 8)

Expand the expression -2.5(-3 + 4n + 8)