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2 years ago

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the ratio of number of miles walked by fernando in a week to the number walked by julia in a week is 4 to 3. julia waled 15 mile

s. how many miles did fernando walked in a week?

1 answer:

Maurinko [17]2 years ago

7 0

4/3 = F/15
15*(4/3) = F
20 = F

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The graphs below have the same shape. What is the equation of the red

anyanavicka [17]

Answer:

Option B is correct .

Step-by-step explanation:

According to Question , both the graph have same shape . If we look at the the first graph it cuts x - axis at (0 , 2) and ( 0 , -2) . Hence x = 2 and -2 are the zeroes of the equation .

And ,the given function is ,

$\implies f(x) = 4 - x^2 \\\\\implies f(x) = 4-x^2=0 \\\\\implies 2^2-x^2=0\\\\\implies (2-x)(2+x) = 0 \\\\\boxed{\red{\bf \implies x = 2 , (-2) }}$

<u>Hence ,we can can see that x = </u><u> </u><u>2</u><u> </u><u>and</u><u> </u><u>(</u><u>-</u><u>2</u><u>)</u><u> </u><u>are</u><u> </u><u>the</u><u> </u><u>zeroes </u><u>of </u><u>graph</u><u>. </u><u> </u>

This implies that if we know the zeroes , we can frame the Equation.

On looking at second parabola , it's clear that cuts x - axis at ( 1, 0 ) and (-1,0). So , 1 and -1 are the zeroes of the quadratic equation . Let the function be g(x) . Here , a and ß are the zeroes.

$\implies g(x) = (x-\alpha)(x-\beta) \\\\\implies g(x) = (1+x)(1-x) \\\\\boxed{\pink{\bf \implies g(x) = 1 - x^2}}$

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2 years ago

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What is the solution of the system of equations? y=-4x+10 y=-2x-6

Elina [12.6K]

Question-

What is the solution of the system of equations? y=-4x+10 y=-2x-6

Answer-

y = -4x + 10

y = -2x - 6

-4x + 10 = -2x - 6

-4x + 2x = -6 - 10

-2x = -16

x = -16/-2

x = 8

y = -4x + 10

y = -4(8) + 10

y = -32 + 10

y = -22

solution is (8,-22)

Hope i helped have a wonderful day

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Answer:

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Step-by-step explanation:

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