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2 years ago

If y =x^2 + 3x - 5, find y when

Mathematics

1 answer:

Andrei [34K]2 years ago

4 0

Answer:

yes it is -1

Step-by-step explanation:

you made something wrong in the power 2 where x power 2 removes the negative sign

or u didn't enter in the calc this sign(....)^2

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PLZZZZZZZZZZZZZZZ HELP I HAVE NO CLUE ON WHAT THE ANSWER ARE!!! PLZZZZZZZZZZZZZZZZZZZZZZZZZ HELP!!!!

koban [17]

Answer:

It would be B & E

Step-by-step explanation:

6 0

2 years ago

14. Write a two-column proof.

scZoUnD [109]

Given:

$\bold{ 8x=4y-20} \\\\ \bold{ y=13}$

Prove:

$\bold{x=4}$

Solution:

$\to \bold{8x=4y-20}..........(i)\\\\\to \bold{ y=13}........................(ii)$

Putting the value of equation (ii) into the equation (i):

$\to \bold{8x=4(13)-20}\\\\\to \bold{8x=52-20}\\\\\to \bold{8x=32}\\\\\to \bold{x=\frac{32}{8}}\\\\\to \bold{x= 4}\\\\$

putting the value x into the equation (i):

$\to \bold{8(4)=4y-20}\\\\\to \bold{32=4y-20}\\\\\to \bold{32+20=4y}\\\\\to \bold{52=4y}\\\\\to \bold{y=\frac{54}{4}}\\\\\to \bold{ y= 13.5}$

Therefore, the value of x= 4

Learn more:

brainly.com/question/6219408

3 0

2 years ago

Solve each quadratic equation by factoring. <br> Show steps pls<br> 8x^2 - 4x = 2x +9

saw5 [17]

Answer:

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4 0

2 years ago

Read 2 more answers

The equation h = -16t 2+ 53x + 8 gives the height h, in feet, of a football as a function of time t, in seconds, after it is kic

Elanso [62]

Answer: The maximum height the football reaches = 51.89 feet.

Step-by-step explanation:

Given: The equation $h = -16t^2+ 53t + 8$ gives the height h, in feet, of a football as a function of time t, in seconds, after it is kicked.

Differentiate the given equation, we get

$h'=-(2)16t+53=-32t+53$ (i)

Put $h'=0$

$\Rightarrow\ -32t+53=0\\\\\Rightarrow\ t=\dfrac{53}{32}\approx1.65625$

Differentiate (i) w.r.t. t, we get

$h''=-32$ < 0 i.e. h is maximum at t= 1.65625

The value of h at t= 1.65625 will be $-16(1.65625)^2+53(1.65625)+8=51.890625\approx51.89\text{ feet}$

Hence, the maximum height the football reaches = 51.89 feet.

8 0

2 years ago

If Sarah's mom drive 20 miles to work, drives 2,000 miles to New York and she lives in Rhode Island. How many total feet did she

mafiozo [28]

To solve this problem, you first have to add the total miles driven.

2000 + 20 = 2020

Then, you have to convert miles into feet. There are 5280 feet in a mile, so you multiply that by 2020.

5280 * 2020 = 10665600

Therefore, the total feet driven is 10665600. I hope this helped, good luck!

5 0

2 years ago