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4 years ago

Solve each system by substitution x^2 − 14x + 49 = 4?

Mathematics

1 answer:

DiKsa [7]4 years ago

3 0

The answer would be x=5 or x=9

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nasir starts with 500 ml of juice and drinks 250 ml of it Johnny starts with 400 ml of juice and drinks 180 ml of it who has the

ki77a [65]

Nasir has 250 mL of juice left and Johnny has 220 mL, so Nasir has more juice left

8 0

3 years ago

a car travels 120 mi. a second car, travelling 10 mph faster than the first car, makes the same trip in 1 hr less time. find the

Murrr4er [49]

Let x be the speed of the first car, then (x + 10) is the speed of the second car.

We can write the equation by the condition of the problem:

$\frac{120}{x}- \frac{120}{x+10}=1 \\ 120(x+10)-120(x)=1(x)(x+10) \\ 120x+1200-120x=x^2+10x \\ x^2+10x-1200=0 \\ D=b^2-4ac=10^2-4*1*(-1200) = 100+4800 = 4900 \\ x_{1,2}= \frac{-bб \sqrt{D} }{2a} \\ \\ x_1= \frac{-10- \sqrt{4900} }{2}= \frac{-10-70}{2} = -\frac{80}{2}=-40 \ \ \ \O$

$x_2= \frac{-10+ \sqrt{4900} }{2}= \frac{-10+70}{2} = \frac{60}{2}=30$ mph speed of the first car

Then 30+10=40 mph speed of the second car

Answer: 30mph and 40 mph.

I hope this helps.

8 0

4 years ago

Please help a girl out

insens350 [35]

Answer:

Given- y= -5x^2 +5

ATQ,

if it translated vertically downwards then the new function will be,

h = y - 5 = -5x^2

PLEASE MARK AS BRAINLIEST AND FOLLOW IF IT HELPED YOU!

4 0

3 years ago

According to einstein, nothing in the universe can move faster than which approximate speed? 1.0 × 107 m/s 1.0 × 108 m/s 3.0 × 1

Helga [31]

The speed of light is 3.0 ×108m/s.

We have ask about the theory of Albert Einstein,

According to einstein, nothing in the universe can move faster than light

<h3>What is the speed of the light?</h3>

Albert Einstein said that nothing travels faster than the speed of light, and the speed of light is

$3.0\times108 m/s$

So that the nothing can travels faster than the speed of light.

light travels with very high speed.

Therefore we get the correct option is 3.

That is the speed of light is 3.0 ×108m/s.

To learn more about the speed of light visit:

brainly.com/question/104425

4 0

2 years ago

What is it called when your equation is 0x=5

laila [671]

I just write not possible

8 0

3 years ago