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Kamila [148]
2 years ago
8

QUICKLY HELP ME PLSSSSS

Mathematics
2 answers:
joja [24]2 years ago
7 0

Answer:

479

Step-by-step explanation:

342=2 portions

171=1 portion

2+5=7 portions in total

171 times 7=479

hope this helps

please can i get brainliest

Lorico [155]2 years ago
4 0

Answer:

A

Step-by-step explanation:

You add 2:5 and then you muplity 342 with 2:5

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enelope determined the solutions of the quadratic function by completing the square. f(x) = 4x2 + 8x + 1 –1 = 4x2 + 8x –1 = 4(x2
Marat540 [252]
The correct question is
<span>Penelope determined the solutions of the quadratic function by completing the square.
f(x) = 4x² + 8x + 1
–1 = 4x² + 8x
–1 = 4(x² + 2x)
–1 + 1 = 4(x² + 2x + 1)
0 = 4(x + 2)²
0 = (x + 2)²
0 = x + 2
–2 = x
What error did Penelope make in her work?

we have that
</span>f(x) = 4x² + 8x + 1
to find the solutions of the quadratic function
let
f(x)=0
 4x² + 8x + 1=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

 (4x² + 8x)=-1

Factor the leading coefficient 

 4*(x² + 2x)=-1

Complete the square Remember to balance the equation by adding the same constants to each side.

 4*(x² + 2x+1)=-1+4 --------> ( added 4 to both sides)

Rewrite as perfect squares

4*(x+1)²=3

(x+1)²=3/4--------> (+/-)[x+1]=√3/2

(+)[x+1]=√3/2---> x1=(√3/2)-1----> x1=(√3-2)/2

(-)[x+1]=√3/2----> x2=(-2-√3)/2

therefore

the answer is

<span>Penelope should have added 4 to both sides instead of adding 1.</span>
6 0
3 years ago
Read 2 more answers
Pleaseee help with 22 &amp; 23 !! ASAP !!
Blizzard [7]

#22. We are given that y = 1/4. So, we want to plug this value into the expression 15/y:

15/(1/4)

When you divide by a fraction, you should follow the rule “flip the guy and multiply”. Basically, 15/(1/4) = 15 * 4 = 60.

The answer for #22 is (D).

#23. We can use a proportion:

(The shaded area)/(entire circle area) = (360 - 60)/360

But, we don’t have to find the areas of the region and circle; we can just solve the fraction:

(360 - 60)/360 = 300/360 = 30/36 = 5/6

The answer for #23 is (A).

5 0
3 years ago
Read 2 more answers
A gift box is 10 inches long and 6 inches wide. It is 3 inches tall. What is the volume of the box? PLEASE SHOW YOUR WORK!
ruslelena [56]

Answer:

180 in

Step-by-step explanation:

10*6*3=180

4 0
3 years ago
Answer 2. will give brainliest
postnew [5]

Answer:

I think c and d

Step-by-step explanation:

srry if im wrong

3 0
3 years ago
What is (-8) third power
Aleks04 [339]

-512.

Type negative 8 to the third power in google. It really is the answer. :)

6 0
3 years ago
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