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Mariulka [41]
3 years ago
13

(2x^2+7x-4)+(-10x-4)​

Mathematics
1 answer:
arsen [322]3 years ago
3 0

Answer:

2x^{2} -3x-8

Step-by-step explanation:

Combine like terms: \\7x+(-10x)=-3x\\-4+(-4)= -8 \\Write in standard form:\\2x^{2} -3x-8

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Twin​ brothers, Billy and​ Bobby, can mow their​ grandparent's lawn together in 53 minutes. Billy could mow the lawn by himself
podryga [215]
5353 minutes = 89.22 hours
Maybe the figures should be 53 and 20??

Let's let Billy = A
The formula to use for work problems is
Time = (A*B) / (A+B)

53 = ( (A +20)* A) / (A +20 + A) )
53 = ( A^2 + 20A ) / (2A + 20)
A^2 + 20A -106A -1060
A^2 -86A -1060
A = 96.935
Bobby Mows in 116.935 minutes

3 0
3 years ago
Help Please... 15 points :)
morpeh [17]

Answer:

√100 = 10, √36 = 6, √225 = 15

Step-by-step explanation:

100 can be made by 10^2 (10 x 10), 36 has factors of 6 and can be made by 6^2, and 225 can be made by 15^2.

5 0
3 years ago
Read 2 more answers
(w-2) (w+5) <br> I need help I don't understand ...
Phantasy [73]
<h3>Answer: w^2 + 3w - 10</h3>

===============================================

Work Shown:

Let x = w-2

This will allow us to replace the (w-2) with x to get...

(w-2)(w+5)

x(w+5)

x*w + x*5 ... distribute

w(x) + 5(x)

Now replace x with w-2 and distribute again

w(x) + 5(x)

w(w-2) + 5(w-2)

w*w + w*(-2) + 5*w + 5*(-2)

w^2 - 2w + 5w - 10

w^2 + 3w - 10

6 0
3 years ago
Read 2 more answers
What is x minus the square root of 2
Zielflug [23.3K]

Answer:

x - sqrt(2)

Step-by-step explanation:

x - sqrt(2)

6 0
3 years ago
I need help :(( I need to divide then put it in simplest form
ValentinkaMS [17]

2*3/8

whenever dividing the second fraction flips

2*3/8

You can divide by 2 for 2 and 8

2/2=1

8/2=4

1/4*3

=3/4

Answer is 3/4

7 0
3 years ago
Read 2 more answers
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