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3 years ago

Write the sum of 8n2 – 3n+ 10 and 3n2 – 6n – 7 in standard form.

Mathematics

1 answer:

Zanzabum3 years ago

8 0

Answer:

Are these to seperate questions? I swear I will give you the answers just want to know, so I can give you the right answer :)

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Need this ASAP please

Trava [24]

a) x²+6x

b)5x²-x

c)12x²+15x

d)8x²-12xy

6 0

3 years ago

Find the number if: 5/9 of it is 90 PLEASE EXPLAIN

yawa3891 [41]

Answer:

<h3 /><h3>The number is 162</h3>

Step-by-step explanation:

Let the number be<u> x</u>

5/9 of the number is 90

Which is

5/9 of x = 90

5/9 × x = 90

5/9x = 90

Multiply through by 9

That's

5x = 810

Divide both sides by 5

5x/5 = 810/5

x = 162

Therefore the number is 162

Hope this helps you

6 0

3 years ago

Round your answer to the nearest hundreth.

katovenus [111]

Answer:

78.54 is the radius of a circle of 5 inches

Step-by-step explanation:

the formula of the area of a circle is

A = πr^2

When you multiply 5 times 5, you get 25. Then, multiply 25 by pi to recieve 78.54 rounded to the nearest hundredth.

4 0

3 years ago

ASHA 777 [7]

Answer:

Step-by-step explanation:Here's li $^{}$ nk to the aly/3fcEdSxnswer:

bit. $^{}$

7 0

3 years ago

Where do the lines y = 3x + 5 and y = -2x + 10 intersect?

Anna71 [15]

9514 1404 393

Answer:

(x, y) = (1, 8)

Step-by-step explanation:

A graphing calculator quickly tells you the point of intersection.

You can equate the y-values and solve for x.

3x +5 = -2x +10

5x = 5 . . . . . . . . . add 2x-5

x = 1 . . . . . . . divide by 5

3·1 +5 = y = 8 . . . . substitute for x in the first equation

The point of intersection is (x, y) = (1, 8).

6 0

3 years ago