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liq [111]
3 years ago
9

HELP ASAP!

Mathematics
2 answers:
Serhud [2]3 years ago
7 0

Answer:

-4x2-5(x+3)+x2

=-4x2-5x-15+x2

=-4x2+x2-5x-15

=-3x2-5x-15

The correct answer is D) - 3x2-5x-15

VashaNatasha [74]3 years ago
6 0

Answer: D) -3x2-5x-15


Step-by-step explanation:

-4x2-5(x+3)+x2

-3x2-5x-15

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Maria practice the piano 5/6 of an hour everyday. How many hours does she practice in 4 days
S_A_V [24]
Answer:
10/3 hours

Explanation:
If Maria practices 5/6 hours a day, then she practices (5/6)(4) hours in 4 days.

(5/6)(4)=20/6

20/6 can be simplified to 10/3 hours.

I hope this helps!
3 0
3 years ago
Can someone please explain?
geniusboy [140]

This is an isosceles triangle. The angles at the base are congruent (they have the same measures).

Look at the picture.

We know: The sum of the measures of angles in a triangle is equal 180°.

Therefore we have the equation:

2x-10+2x-10+3x+25=180       <em>combine like terms</em>

(2x+2x+3x)+(-10-10+25)=180

7x+5=180           <em>subtract 5 from both sides</em>

7x=175              <em>divide both sides by 7</em>

x=25

m\angle A=2x-10\to m\angle A=2(25)-10=50-10=40\\\\m\angle C=m\angle A=40\\\\m\angle B=3x+25\to m\angle B=3(25)+25=75+25=100^o

<h3>Answer: D. m∠C = 40</h3>

6 0
3 years ago
Hello can someone please help?
Ray Of Light [21]
The answer is D
Hope this helps
7 0
3 years ago
If b² = 25, then b =____
GREYUIT [131]

Answer:

5

Step-by-step explanation:

b^2= (5)^2 = 25

So.... b=5 or -5

5 0
2 years ago
Read 2 more answers
Is this function linear or nonlinear?​
Ivahew [28]
Nonlinear. hope this helps :D
4 0
2 years ago
Read 2 more answers
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