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3 years ago

Find the solution to the system of equations. y = -4x - 3 and y = x + 3

Mathematics

1 answer:

I am Lyosha [343]3 years ago

5 0

Answer:

x=-y+3/4

second one x=y-3

Step-by-step explanation:

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Need help will give you a good rating us

vovikov84 [41]

Answer:

$\boxed{2\pm \frac{\sqrt{2}}{2}}$

Step-by-step explanation:

$2x^2-8x=-7$

$\sf Add \ 7 \ on \ both \ sides}.$

$2x^2-8x+7=-7+7$

$2x^2-8x+7=0$

$ax^2 +bx+c=0$

$\sf Apply \ quadratic \ formula.$

$a=2 \ \ \ b=-8 \ \ \ c = 7$

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x=\frac{-(-8)\pm\sqrt{(-8)^2-4(2)(7)}}{2(2)}$

$x=\frac{8\pm\sqrt{64-56}}{4}$

$x=\frac{8\pm\sqrt{8}}{4}$

$x=\frac{8\pm2\sqrt{2}}{4}$

$x=2\pm \frac{\sqrt{2}}{2}$

4 0

3 years ago

11. Solve.<br>10 =|4x+6]

Mariulka [41]

Answer:

Step-by-step explanation:

10 = 4x+6

-4x = -10+6

-4x = -4

x = -4/-4

x = 4/4

x = 1

4 0

3 years ago

There are 7 red 3 green 2 blue and 8 purple marbles in a bag if a marble is randomly chosen 250 times predict how many times it

kati45 [8]

Answer:

It should be red or green 125 times

Step-by-step explanation:

The first thing to do here is to calculate the probability of selecting a red or a green marble

Total number of marbles = 7 + 3 + 2 + 8 = 20

Probability of selecting a red marble is 7/20

Probability of selecting a green marble is 3/20

The probability of selecting a red or a green marble = Probability of selecting a red marble + Probability of selecting a green marble = 7/20 + 3/20 = 10/20 = 1/2

Now our selection spans 250 times, the number of times it should have been a green or a red marble = The probability of selecting a green or a red marble * number of selection times = 1/2 * 250 = 125 times

3 0

3 years ago

Help please ten points I’ll mark brailiest

Mama L [17]

KJ, IK, HI, HK, then HJ

i think this is it. hope it helps!! :)

7 0

3 years ago

Gerry is making flower arrangements. She has 24 lilies and 40 orchids. Each

erica [24]

Answer:

8 arrangements

Step-by-step explanation:

The highest common factor of 24 and 40 is 8

40 / 8 = 5

24 / 8 = 3

5 orchids and 3 lilies per arrangement makes 8 arrangements

8 0

3 years ago