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just olya [345]
3 years ago
11

2x + 3y- z = 13 3x - 4y+z = -2 x + 2y + 2z= 21

Mathematics
2 answers:
Oksana_A [137]3 years ago
8 0
What’s the question ?
11111nata11111 [884]3 years ago
8 0

Answer:

17

Step-by-step explanation:

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What is the equation in vertex form of a parabola with vertex (-2, -2) that opens downward and is stretched by a factor of 5?
Galina-37 [17]

Answer:

D).  -5(x + 2)^2 - 2.

Step-by-step explanation:

Parabola which Opens down and vertex (-2, -2) is :

f(x) = a(x + 2)^2 - 2 where a is negative

Stretch by factor 5 gives:

-5(x + 2)^2 - 2.

5 0
3 years ago
when a ball is dropped onto a flat floor , it bounces to 65% of the height from which it was dropped. if the ball is dropped fro
34kurt
The height of the fifth bounce
80x65%x65%x65%x65%x65%
=9.282325 cm
8 0
3 years ago
Christine went shopping and bought each of her eighteight nephews a​ gift, either a video costing​ $14.95 or a CD costing​ $16.8
pogonyaev
So I think you should set up an equation like this: 14.95x+16.88y=131.18 , x+y=8

so x=8-y, plug this into the original equation:
14.95(8-y)+16.88y=131.18
Evaluate: 119.60-14.95y+16.88y=131.18
Combine like terms: 119.60+1.93y=131.18
Subtract 119.60 from both sides. You get: 1.93y=11.58
Divide both sides by 1.93. You get y=6

Plug into second equation: x+y=8 ---> x+6=8 and solve for x. x=2

Christine bought 2 video games and 6 CDs. 14.95(2)+16.88(6)=131.18
4 0
4 years ago
HELP ASAP<br> What is the measure of ZDBE?<br> A. 120°<br> B. 45°<br> C. 75°<br> D. 60°
kolezko [41]
B. 45 degrees is the answer
4 0
2 years ago
Read 2 more answers
What is x in 3.6x=1.6x+24
Ipatiy [6.2K]

Answer:

x=12

Step-by-step explanation:

3.6x=1.6x+24

We simplify the equation to the form, which is simple to understand

3.6x=1.6x+24

We move all terms containing x to the left and all other terms to the right.

+3.6x-1.6x=+24

We simplify left and right side of the equation.

+2x=+24

We divide both sides of the equation by 2 to get x.

x=12

7 0
3 years ago
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