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Naddik [55]
3 years ago
14

Solve by the substitution method. -3x – 3y = 3 y=-5x – 17

Mathematics
1 answer:
Mazyrski [523]3 years ago
4 0

Answer:

postive 6

Step-by-step explanation:cause negative plus a negative equals a postive

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Answer please lot's of points.
Svetlanka [38]

Answer:

t≈8.0927

Step-by-step explanation:

h(t) = -16t^2 + 128t +12

We want to find when h(t) is zero ( or when it hits the ground)

0 =  -16t^2 + 128t +12

Completing the square

Subtract 12 from each side

-12  =  -16t^2 + 128t

Divide each side by -16

-12/-16  =  -16/-16t^2 + 128/-16t

3/4 = t^2 -8t

Take the coefficient of t and divide it by 8

-8/2 = -4

Then square it

(-4) ^2 = 16

Add 16 to each side

16+3/4 = t^2 -8t+16

64/4 + 3/4= (t-4)^2

67/4 = (t-4)^2

Take the square root of each side

±sqrt(67/4) =sqrt( (t-4)^2)

±1/2sqrt(67) = (t-4)

Add 4 to each side

4 ±1/2sqrt(67) = t

The approximate values for t are

t≈-0.092676

t≈8.0927

The first is before the rocket is launched so the only valid answer is the second one

3 0
3 years ago
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Elli has some money
STALIN [3.7K]
15$ I believe, as we can disregard the two original books (they have been payed for) leaving her to buy 1 book and having seven dollars, however if she needs $8 more you simply need to add 8+7.
4 0
3 years ago
What is the value of the six in 106,534
aleksley [76]
6,000 because its in the thousandth and so since its a six in the thousandths its 6,000 remember the comma
8 0
3 years ago
Can you help me find the value of x and y. I am very confused.
Monica [59]
Hello,
Let's assume top left  corner: A
top right corner : B
Bottom right corner: C
Bottom left corner :D

M= middle of [CD]

ABM is a triangle rectangular isocel:

(3√2)²+(3√2)²=y²
==>y²=2*9*2
==>y²=36
==>y=6

The triangle BCM is rectangular with MB=3√2, MC=y/2=3
x²+3²=(3√2)²
==>x²=9*2-9
==>x²=9
==>x=3

8 0
3 years ago
I NEED HELP BUT UTS NOT LIKE HELPPPPPP PLS SO YEAH
fenix001 [56]

Answer: the answer is B

Step-by-step explanation:

8 0
3 years ago
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