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katrin2010 [14]
3 years ago
12

Multiply. (3b-5) (7b+1) Simplify your answer.

Mathematics
1 answer:
mylen [45]3 years ago
7 0
<h3>Answer:</h3>

It would be 21b² -32b -5

<h3>Step-by-step explanation:</h3>

By using the FOIL method, you can simplify the equation.

<em>The Foil Method is </em><u><em>ac + ad + bc +bd</em></u><em>, or </em><u><em>First, Outer, Inner, Last.</em></u>

First, you multiply the first term in each bracket.

3b * 7b = 21b²

Next, you multiply the outer term in each bracket.

3b * 1 = 3b

Then, you multiply the inner term in each bracket.

-5 * 7b = -35b

After that, you multiply the last term in each bracket.

-5 * 1 = -5

Lastly, you combine like terms.

21b² + 3b -35b -5 ---> 21b² -32b -5

<em>21b² -32b -5 would be your answer, since you cannot simplify the equation anymore.</em>

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Can u guys please help me?
Eduardwww [97]

Answer:

9m

Step-by-step explanation:

The surface area of a cube is given by

SA = 6s^2  where s is the side length

We know the surface area is 486 and the side length is z

486 = 6z^2

Divide each side by 6

486/6 = 6z^2/6

81 = z^2

Take the square root of each side

sqrt(81) = sqrt(z^2)

9 = z

Each side has a length of 9m

5 0
4 years ago
The cost of a bus for a field trip was split evenly between the 120 students going. But the day before the trip, 30 more student
Igoryamba
Hey there,

So there would be 150 students × by $1.20 per person would be $180.
_______________________________________________________________

→ All that was needed to do was to do 150 students multiplied by the prices of 1.20. That's it! Final answer would be $180.

Final answer $\boxed{180}

Hope this helps.

~Jurgen
4 0
3 years ago
Read 2 more answers
Any help with this please?
Leni [432]

Answer:

∠1=128°

∠2=52°

∠3=47°

∠4=133°

∠5=81°

Step-by-step explanation:

6.

∠1=180-52=128°

∠2=52°(alternate angles)

∠4=180-47=133°

∠3=47°(alternate angles)

∠2+∠3+∠5=180

52+47+∠5=180

∠5=180-99=81°

8 0
3 years ago
Simplify negative 2 over 3 ÷ negative 7 over 4.
romanna [79]
The answer is B) -8/21
8 0
4 years ago
Read 2 more answers
I need help on this.
Mice21 [21]

Answer:

3

Step-by-step explanation:

10:15=2:3

6:x=10:(15-10)=2:1

x=3

6 0
3 years ago
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