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agasfer [191]
3 years ago
11

Simplify -5(3m2 + 7n2) + 8n2

Mathematics
2 answers:
Blababa [14]3 years ago
6 0

Answer:

\boxed{\red{=  - 3(5 {m}^{2}   + 9 {n}^{2} )}}

Step-by-step explanation:

- 5(3 {m}^{2}  + 7 {n}^{2} ) + 8 {n}^{2}  \\  - 15 {m}^{2}  - 35 {n}^{2}  + 8 {n}^{2}  \\  =  - 15 {m}^{2}  - 27 {n}^{2}  \\  =  - 3(5 {m}^{2}   + 9 {n}^{2} )

son4ous [18]3 years ago
5 0

Answer:

<h3>-15m² - 27n²</h3>

Step-by-step explanation:

-5(3m² + 7n²) + 8n²

Expand brackets.

-15m² + -35n² + 8n²

Combine like terms.

-15m² + -27n²

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What is the missing dimention with a cilinder with base as d and the height as 14 and it has a volume of 7433 in 3
Korolek [52]

Answer:

26in

Step-by-step explanation:

Volume of a cylinder = πr²h

Given

height h = 14in

Volume = 7433in³

Required

base d = 2r

r is the  radius

get the radius r

7433 = 3.14 * 14r²

7433 = 43.96r²

r² = 7433/43.96

r² = 169.08

r = 13.00

Since the base d = 2r

d = 2(13)

d = 26in

Hence the base of the cylinder is 26in

4 0
3 years ago
Start at 3 and create a pattern with the rule add 2 what is the 5th rumber in the answer
Maru [420]

Answer:13

Step-by-step explanation:

3,5,7,9,11,13

6 0
3 years ago
Please heeeeeeeeeeeeeeeeeeeeeeeeeelp
hram777 [196]
B) x=2 and y=14 i’m pretty sure lol
5 0
3 years ago
Help meeeeeeeeee I need the answer
Tanzania [10]

Answer:

d is the answer

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
What is the value of x in the equation 1.5(x + 4) – 3 = 4.5(x – 2)?
rjkz [21]
Hello!

Step 1: Simplify both sides of the equation.<span><span><span>
1.5<span>(<span>x+4</span>)</span></span>−3</span>=<span>4.5<span>(<span>x−2</span>)</span></span></span><span><span><span><span><span><span>

(1.5)</span><span>(x)</span></span>+<span><span>(1.5)</span><span>(4)</span></span></span>+</span>−3</span>=<span><span><span>(4.5)</span><span>(x)</span></span>+<span><span>(4.5)</span><span>(<span>−2</span>)</span></span></span></span>(Distribute)<span><span><span><span><span>

1.5x</span>+6</span>+</span>−3</span>=<span><span><span>4.5x</span>+</span>−9</span></span><span><span><span>

(<span>1.5x</span>)</span>+<span>(<span>6+<span>−3</span></span>)</span></span>=<span><span>4.5x</span>−9</span></span>(Combine Like Terms)<span><span><span>

1.5x</span>+3</span>=<span><span>4.5x</span>−9</span></span><span><span><span>
</span></span></span>Step 2: Subtract 4.5x from both sides.<span><span><span><span>

1.5x</span>+3</span>−<span>4.5x</span></span>=<span><span><span>4.5x</span>−9</span>−<span>4.5x</span></span></span><span><span><span>

−<span>3x</span></span>+3</span>=<span>−9</span></span>

Step 3: Subtract 3 from both sides.<span><span><span><span>

−<span>3x</span></span>+3</span>−3</span>=<span><span>−9</span>−3</span></span><span><span>

−<span>3x</span></span>=<span>−12</span></span>

Step 4: Divide both sides by -3.<span><span><span>

−<span>3x</span></span><span>−3</span></span>=<span><span>−12</span><span>−3</span></span></span><span>

x=<span>4

Hope this helps! Cheerio, and have a lovely day!</span></span>
7 0
3 years ago
Read 2 more answers
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