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3 years ago

What two numbers can multiply to equal -63 as well as add to equal -2?

Mathematics

1 answer:

bonufazy [111]3 years ago

4 0

Answer: -9 and 7

Step-by-step explanation: $-9x7=63$ and $-9+7=-2$

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3. 0.7kg : 800g I’m pretty bad with ratios lol

julsineya [31]

Answer:

7:8

Step-by-step explanation:

Convert o.7 Kg to Gram

It will be 700 grams

Divide it by 800

700

800

= 7

7 0

3 years ago

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Find the sum and express it in the simplest form (-2y-4x+7)+(-4y+x-1)

Marina86 [1]

Y=7+2x......(1)

put this value in 4y+x=1

4(7+2x)+x=1

28+14x+x=1

15x=-27

x=-27/15.....(2)

put this value in eqn (1)

y=7+2(-27/5)

y=7-54/5

y=-3.8

I really hope this helps :D:D:D!!!!

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3 years ago

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How do you solve an equation like 2+6+7+20x

Leokris [45]

The answer would be 15 +20x. You have to combine like terms.

2+6+7+20x
8+7+20x
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5 0

3 years ago

2x2 - 12x + 10 what are the roots

Tcecarenko [31]

Answer:

5 & 1

Step-by-step explanation:

We can use the quadratic formula to solve this:

Quadratic Formula = $\frac{-b+-\sqrt{b^2-4ac} }{2a}$

So we will have 2 answers (roots).

a is the coefficient of x^2 (2)

b is the coefficient of x (-12)

c is the constant (10)

Now, substituting, we get:

x = $\frac{-b+-\sqrt{b^2-4ac} }{2a}=\frac{12+-\sqrt{(-12)^2-4(2)(10)} }{2(2)}=\frac{12+-\sqrt{64} }{4}=\frac{12+-8}{4}=\frac{12+-8}{4}=5,1$

Hence the roots are 5 & 1

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SOVA2 [1]

Answer:

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3 years ago