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3 years ago

What is the y-intercept of a line that has a slope of –3 and passes through point (0, –7)?

Mathematics

2 answers:

tamaranim1 [39]3 years ago

4 0

Answer:

its A. -7

Step-by-step explanation:

y = mx + b

(-7) = (-3)(0) + b

-7 = b

hammer [34]3 years ago

3 0

-7

y = mx + b
(-7) = (-3)(0) + b
-7 = b

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A ball is thrown from an initial height of 2 meters with an initial upward velocity of 9/ms . The ball's height h (in meters) af

Alecsey [184]

A ball is thrown from an initial height of 2 meters with an initial upward velocity of 9/ms

Balls height $h= 2 +9t -5t^2$

To find all values of t for which the ball's height is 3 meters

We plug in 3 for h and solve for t

$h= 2 +9t -5t^2$

$3 = 2 +9t -5t^2$

Solve for t

$0= -1+ 9t -5t^2$

$5t^2 - 9t + 1 = 0$

Solve using quadratic formula

$t= \frac{-b+- \sqrt{b^2-4ac} }{2a}$

$t= \frac{9+- \sqrt{(-9)^2-4*5*1} }{2*5}$

After simplifying this,

$t= \frac{9+\sqrt{61}}{10}$ = 0.11898

$t= \frac{9-\sqrt{61}}{10}$ = 1.68102

the values of t for which the ball's height is 3 meters= 0.12 sec , 1.68 sec

5 0

3 years ago

My son is seven times older than my grandson and iam 12 times older than my grandson. All of our ages added together equal 100

n200080 [17]

Answer:

5 (grandson's age now)

35 (son's age now)

60 (father's age now)

Step-by-step explanation:

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2 years ago

X over 3 equals 1 over 4. how do i solve this in algebra? its solving one-step equations.

Snezhnost [94]

Cross multiply X×4=3×1 4x=3 X= 3/4

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3 years ago

Please help. I'll give brainliest :)

Amanda [17]

Answer:

it would be 100

Step-by-step explanation:

if 1=50 and you have 2 then multiple 50 by 2 and that gives you 100

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2 years ago

Question

kozerog [31]

So to find the width (w)
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3 years ago