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3 years ago

12. The roots of a quadratic are x = -5 and x = 3.

1 answer:

8 0

3 , because, 8 think i because, so deinslfy and I have to do this for the next week or so and i and again to je to park on je road and then we Iz

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How do you do this problem?

astra-53 [7]

By substitution is how to solve

2x-3y=21
y=3-x

2x-3(3-x)=21
2x-9+3x=21
5x=30
x= 6

now substitute our x value into y=3-x
so we get

y=3-6 = -3

so x=6 and y=-3 hope this helps!!!!! Thank you!

5 0

3 years ago

Read 2 more answers

You select a card at random from the cards that make up the word "replacement". Without replacing the card, you choose a second

lutik1710 [3]

Answer:

The probability is 14/55

Step-by-step explanation:

The word replacement contains 11 letters.

In which 4 letters are vowel = e,a,e,e

And 7 letters are not vowel = r,p,l,c,m,n,t

The probability of getting the vowel in the first try = 4/11

The probability of getting something that is not a vowel = 7/10.

The denominator is one less because the vowel card is not replaced, meaning there is one less card to choose from.

Multiply the values:

=4/11 * 7/10

=28/110

=14/55

The probability is 14/55....

5 0

3 years ago

4(2x+8)=5(x+4) solve for X

DerKrebs [107]

x = -4

Have a Merry Christmas!

6 0

3 years ago

-5(t + 6) + 7t = 100

Mila [183]

Use distribution
-5t - 30 + 7t = 100
Combine like terms
2t - 30 = 100
Add 30 to both sides
2t = 130, t = 65
Solution: t = 65

3 0

3 years ago

PLS TRY TO ANSWER ASAP.

Harrizon [31]

Answer:

0.075 m/min

Explanation:

You need to use derivatives which is an advanced concept used in calculus.

1. Write the equation for the volume of the cone:

$V=\dfrac{1}{3}\pi r^2h$

2. Find the relation between the radius and the height:

r = diameter/2 = 5m/2 = 2.5m

h = 5.2m

h/r =5.2 / 2.5 = 2.08

3. Filling the tank:

Call y the height of water and x the horizontal distance from the axis of symmetry of the cone to the wall for the surface of water, when the cone is being filled.

The ratio x/y is the same r/h