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Anna71 [15]
3 years ago
15

What is MULTIPLIED to equal 80 but can be ADDED to make NEGATIVE 21

Mathematics
2 answers:
MrRa [10]3 years ago
6 0
The answer is -16 and -5.
Lelu [443]3 years ago
4 0

Answer:

-7 i think...

Step-by-step explanation:

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X + y = -1<br> X - y = 7
enyata [817]
1: Solve for either x or y in one of the equations. So x + y = -1 is y = -x -1
2: substitute the new equation in the opposite equation. So x - (-x - 1) = 7
3: distribute the negative. X + x + 1 = 7
4: combine like terms. 2x + 1 = 7
5: solve for x. Subtract 1 on both sides. 2x = 6
6: divide by 2 to get x by itself. X = 3
7: plug the new value of x into one of the ORIGINAL equations. 3 + y = -1
8: solve for y. Subtract 3 on both sides.
Y = -4
9: the solution is written as (x,y) so the solution would be (3, -4)
4 0
3 years ago
− 2/3 (−3 − 9x) A) −2 − 9x <br> B) 2 − 9x <br> C) 2 − 6x <br> D) 2 + 6x
ANEK [815]

Answer:

D 2+6x

Step-by-step explanation:

-2/3(-3-9x)

(-2/3×-3)+(-2/3×-9x)

6/3+18x/3 = 2 + 6x

8 0
3 years ago
Read 2 more answers
Let X be the number of purchases that Fred will make on the online site for a certain company (in some specified time period). S
Mrac [35]

Answer: ???

Step-by-step explanation:

6 0
3 years ago
We have 500 grams of a 10% salt solution. How many grams of water must be added to dulite the solution to form a 4% solution. Sh
lys-0071 [83]
Hmm, one way is this
there's 500 times 0.10 or 50 grams of salt in the water
if we want to make 50 grams=4% of everything, how much water do we need to add

50=4% of all
50=0.04 of all
divide both sides by 0.04
1250=all
so
500+what=1250
minus 500 both sides
what=750

750 grams of water
3 0
3 years ago
Read 2 more answers
What are the values of the variables in the triangle below?
harkovskaia [24]

Answer:

D) x=9 ; y=3√(3)

Step-by-step explanation:

Sin(30)=\cfrac{y}{6\sqrt{3} }

\cfrac{18y}{6\sqrt{3}}=18\sin \left(30^{\circ \:}\right)

\sqrt{3}y=9

\cfrac{\sqrt{3}y}{\sqrt{3}}=\cfrac{9}{\sqrt{3}}

y=3\sqrt{3}

~

Cos(30)=\cfrac{x}{6\sqrt{3} }

\cfrac{18x}{6\sqrt{3}}=18\cos \left(30^{\circ \:}\right)

\sqrt{3}x=9\sqrt{3}

\cfrac{\sqrt{3}x}{\sqrt{3}}=\cfrac{9\sqrt{3}}{\sqrt{3}}

x=9

Therefore, x=9 and y=3√(3)

~

8 0
2 years ago
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