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konstantin123 [22]
3 years ago
8

HELLPPPP!!!

Mathematics
1 answer:
maw [93]3 years ago
8 0

Answer:

-1

Step-by-step explanation:

my bad if i get it wrong

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Solve the following system of equations and show all work.<br> y = -x² + 4<br> y = 2x + 1
Elan Coil [88]

Answer:

Step-by-step explanation:

The ys have to have the same value. That allows you to equate the right side of each y to each other.

-x^2 + 4 = 2x + 1                             Subtract the right side from the left side.

-x^2 + 4 - 2x - 1 = 2x-2x +1 - 1        Combine

-x^2 - 2x + 3 = 0                            Multiply both sides by - 1

-1(-x^2 -  2x + 3) = 0*-1                    Remove the brackets

x^2 + 2x - 3                                   Factor

(x - 1)(x + 3 )

x - 1 = 0

x =   1

x + 3 = 0

x = - 3

So the line goes through x = 1 or x = - 3

x = 1

y = 2x + 1

y = 2(1) + 1

y = 3

x = - 3

y = 2(-3) + 1

y = - 6 + 1

y = - 5

Does the graph confirm this? See below.

red: y = -x^2 + 4

green: y = 2x + 1

Yes the graph is in agreement.

6 0
2 years ago
Jerry is comparing –8 and –10 on a number line. Which is true regarding their locations on the number line?
anygoal [31]
They are a distance of 2 away from each other
3 0
3 years ago
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Which of the following is an equation that best describes compound interest?
cluponka [151]

Answer:

simple interest

Step-by-step explanation:

8 0
4 years ago
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Write 11•47 using the distributive property. Then simplify.
Dennis_Churaev [7]
Distributive property :

a (b+c) = ab + bc

Try writing 47 = 50-3  or 47 = 40+7.

11 x 47 = 11 x (50-3) = 11 x 50 - 11 x 3 = 550 - 33 =  517

or 

11 x 47 =  11 x (40+7) = 11 x 40 + 11 x 7 = 440 + 77 = 517
6 0
4 years ago
What is the simplified form of i14
cestrela7 [59]

Answer:

-1

Step-by-step explanation:

Rewrite i 14 as ( i 4 ) 3 × i 2 . If i = √ − 1 , then i 2 = − 1 .

From here ( i 2 ) 2 = ( − 1 ) 2 , so i 4 = 1 . If i 4 = 1 ,

then we can say that: i 14 = ( 1 ) 3 × i 2 = i 2 = − 1

7 0
3 years ago
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