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vlabodo [156]
3 years ago
13

Analyze Manda's work. Is she correct? If not, what was her mistake?

Mathematics
1 answer:
yulyashka [42]3 years ago
7 0

Answer:

Option 3. In step 3, she did not subtract one x from the left side

Step-by-step explanation:

we have the repeating decimal

0.272727...

Convert to fraction number

step 1

Let

x=0.272727...

step 2

Multiply by 100

100x=27.272727...

step 3

Subtract x from 100x

100x-x=27

99x=27

step 4

Find the value of x

x=27/99

therefore

Manda's work is not correct

In step 3, she did not subtract one x from the left side

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Express in the form 1:n give n as a decimal 8:6
photoshop1234 [79]

Answer: 8.6:8.6

Explanation:

1:n is the form you want.

n is 8.6. change the n value so it is 1:8.6

1 is 1 times bigger than 8.6

8.6 times 1 is 8.6

so you've got 8.6:8.6

your welcome, i hope this helps

3 0
3 years ago
The fifth grade has 152 students. Each student has 18 pencils. How many pencils do the students have altogether? ( and how did y
timurjin [86]
You're given that there's 152 students. Each student has 18 pencils. All you have to do is multiply 152 students x 18 pencils/student, to get 2,736 pencils.
4 0
4 years ago
What is the vertex of the function f(x) = x2 + 12x?
Sophie [7]
We can start by figuring out the axis of symmetry.

y = x² + 12x = x (x + 12)

So roots are x = -12 or 0

Therefore axis of symmetry is x   =   (-12 + 0) / 2   =   -6

We got x-coordinate of vertex. Now plug in x=-6 to solve for y.

y = (-6)² + 12(-6)   =   36 - 72   =   -36

Therefore vertex is (-6, -36).
7 0
3 years ago
PLEASE HELP ME WITH THXXXXXX:)))))))))
Fantom [35]
1) (-7,2)
y=2, -x+4=11, -x=11-4=7, x=-7

2) (-3,4)
-x+2y=11
y=4, -x+8=11, -x=3, x=-3

3) (1,6)
-x+2y=11
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4 0
3 years ago
Pls help pls help pls help​
Volgvan

Answer:

A. y=1-2x

Step-by-step explanation:

-1 =1-2(1)

-1= 1-2

-1=-1

-3=1-2(2)

-3=1-4

-3=-3

-5=1-2(3)

-5=1-6

-5=-5

-7=1-2(4)

-7=1-8

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5 0
3 years ago
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