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Anastaziya [24]
4 years ago
14

Subtract -7x^2+1 from -2x^2-4x

Mathematics
1 answer:
tresset_1 [31]4 years ago
6 0

Answer:5x^2-4x-1

Step-by-step explanation:

-2x^2-4x-(-7x^2+1)

-2x^2-4x+7x^2-1

Collect like terms

7x^2-2x^2-4x-1

5x^2-4x-1

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Z/6 + 2 = −18<br> what does z equal
Nataliya [291]

Answer:

z/6 +2=-18

z/6=-18-2

z/6=-20

z/6 *6=-20*6 we multiple both sides with 6 to remove 1/6 from z

z=-120

8 0
3 years ago
Investment A 50 increases each year by 8% investment B 60 increases by 3 each year what year will investment A be bigger than be
UkoKoshka [18]

Answer:

After 10 years the investment A will be bigger than investment B.

Step-by-step explanation:

In Investment A, 50 increases each year by 8% and in investment B, 60 increases by 3 each year.

If after x years the investment A will be equal to investment B, then we can write the equation as

50(1 + \frac{8 \times x}{100}) = 60 + 3x

⇒ 50 + 4x = 60 + 3x

⇒ x = 10

Therefore, after 10 years the investment A will be bigger than investment B. (Answer)

6 0
3 years ago
claire was able to verify that x=3 was a solution to her teacher's linear equation, but the equation got erasted from thw board.
svet-max [94.6K]
X+5=8
x+(-7)=-4
4+x=7
7-x=4
3-x=0
-9×x= -27
those are just a few options
7 0
4 years ago
How do you simplify the inequality 4x-7&gt;1
ser-zykov [4K]
Solve it like an equation

4x-7>1
+7 +7

(-7+7)= 0 They cancel each other.

(1+7)=8

4x>8
/4 /4

(4/4) Cross it out, since they are both the same number. So, you stay with x.

(8÷4)= 2

You get x>2
4 0
3 years ago
Father is four times as old as Mary. Five years ago he was seven times as old. How old is the father now?
melamori03 [73]

Answer:

If Father is four times older than Mary, that would be 4 times 10-- which equals 40. Five years ago, Mary must have been 5 years old. So, multiply 7 and 5 and you'll get 35! Father would have been 35 years old.

I hope this helps!

Step-by-step explanation:

7 0
3 years ago
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