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hoa [83]
3 years ago
14

Find the solution of this system of equations -2x+3y=-3 and -2x-5y=-75

Mathematics
1 answer:
julsineya [31]3 years ago
7 0

Answer:

<h2>X=15</h2><h2>y=9</h2>

please see the attached picture for full solution..

Hope it helps...

Good luck on your assignment...

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Linda and Juan went shopping. Linda spent $17 less than Juan.
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Answer:

x - 17

Step-by-step explanation:

x is how much Juan spent. Linda spent 17 less. x - 17 = How much Linda spent

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2 years ago
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1/2 dived by what equlels 4
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Answer:

1/8

Step-by-step explanation:

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A projectile is launched into the air. The function h(t) = –16t2 + 32t + 128 gives the height, h, in feet, of the projectile t s
Zinaida [17]

Answer:

t = 4 seconds

Step-by-step explanation:

The height of the projectile after it is launched is given by the function :

h(t)=-16t^2+32t+128

t is time in seconds

We need to find after how many seconds will the projectile land back on the ground. When it land, h(t)=0

So,

-16t^2+32t+128=0

The above is a quadratic equation. It can be solved by the formula as follows :

t=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}

Here, a = -16, b = 32 and c = 128

t=\dfrac{-32\pm \sqrt{(32)^2-4\times (-16)(128)} }{2\times (-16)}\\\\t=\dfrac{-32+ \sqrt{(32)^2-4\times (-16)(128)} }{2\times (-16)}, \dfrac{-32\- \sqrt{(32)^2-4\times (-16)(128)} }{2\times (-16)}\\\\t=-2\ s\ \text{and}\ 4\ s

Neglecting negative value, the projectile will land after 4 seconds.

4 0
3 years ago
four sisters bought a present for their father. They receive a 10% off discount on the original price o the gift. After the disc
valina [46]

the answer should be $40.00

8 0
3 years ago
3x +15 = 2x + 10 + x + 5
Shkiper50 [21]

Answer:

The equation is true.

Step-by-step explanation:

Simplify. Combine like terms:

3x + 15 = (2x + x) + (10 + 5)

3x + 15 = (3x) + 15

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Subtract 3x and 15 from both sides:

3x (-3x) + 15 (-15) = 3x (-3x) + 15 (-15)

3x - 3x = 15 - 15

0 = 0

~ True. The two expressions are equal to each other.

~

4 0
2 years ago
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