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natta225 [31]
3 years ago
12

Nadya solves the equation 4x-4=20. Her work is shown below.

Mathematics
2 answers:
Rama09 [41]3 years ago
6 0
4x-4=20
   +4 +4
4x=24
divide both sides by 4 
x=6
Stells [14]3 years ago
3 0
Step 2 she should add 4 not subtract
You might be interested in
Will give brainliest answer!
kifflom [539]
5x + 60y = 35

x +y = 1.5 : rewrite as x = 1.5-y   and substitute this formula for x in the first one:

5(1.5-y) + 60y = 35

distribute:

7.5 - 5y + 60y = 35

combine like terms:

7.5 + 55y = 35

subtract 7.5 from both sides:

55y = 27.5

divide both sides by 55 to solve for  y

y = 27.5 / 55 = 0.5

now substiute 0.5 for y in the 2nd equation:

x + 0.5 = 1.5

x = 1.5 - 0.5 = 1

 he walked for 1 hour


8 0
3 years ago
A bookmark has an area of 14 square centimeters and a perimeter of 18 centimeters. What are the dimensions of the bookmark?
Naily [24]

Answer:

2 x 7

Step-by-step explanation:

a * b = 14

2a + 2b = 18

(a * b)/b  = 14/b Dividing both sides by b

a = 14/b

Substitute a in the perimeter equation

2(14/b) + 2b = 18

28/b + 2b = 18

2b - 18 + 28/b = 0

Multiply both sides by b

2b^2 - 18b + 28 = 0

Divide both sides by two

b^2 - 9b + 14 = 0

The Factors of 14 include -2 and -7 which add up to -9

(b - 2) * (b - 7) = 0

This has two answers because b can be either the side that is 2 long or 7 long, so there's no need to go back and solve for a.

2 x 7

4 0
3 years ago
Suppose you have a binomial distribution with n = 27 and p = 0.6. find p(8 ≤ x ≤ 11).
krek1111 [17]
The answer appears to be 3.335%

4 0
3 years ago
Write an equation for the translation of y = |x|. 13 units down
olga55 [171]
The idea for transitions for an equation like this is
y = m|x - h| + k
where m = slope
h = how much left or right (note the negative)
k = how much up or down

moving 13 down would mean
k = -13

so
y = |x| - 13
D. would be your answer
7 0
3 years ago
If f(x) = x2 – 6x + 14, what is f(-2)?
Paraphin [41]

Answer: −28

i think ?????

4 0
2 years ago
Read 2 more answers
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