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storchak [24]
3 years ago
6

1. Which statements are true?

Mathematics
1 answer:
podryga [215]3 years ago
5 0
Number 1 a and d are true 

number to its b c and d

number 3 idk, sorry
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A boy is n years old. His sister is four times as old. The sister's age is
Irina18 [472]

The sister is 4<em>n</em><em> </em>yrs old.

That is because 4 times <em>n</em><em> </em>is 4<em>n</em><em>.</em>

5 0
3 years ago
A.
eimsori [14]

Answer: A: 2 and C: 4

Step-by-step explanation:

supplementary angles form a straight line adding up to 180 degree angles

7 0
3 years ago
PLS HELP ASAP An artifact is 4 times older than an antique book. In 200 years the artifact will be 3 times older as the book. Ho
Tresset [83]

Answer: 1,600

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the final answer?
MakcuM [25]
<h3>Answer:  42</h3>

Explanation:

We have y = -0.9x^2 + 76x - 250 which is in the form y = ax^2+bx+c

where,

  • a = -0.9
  • b = 76
  • c = -250

The vertex (h,k) is when the profit is maxed out.

h = -b/(2a)

h = -76/(2(-0.9))

h = 42.222 approximately

Let's plug in x values around x = 42

Try x = 41

y = -0.9x^2 + 76x - 250

y = -0.9(41)^2 + 76(41) - 250

y = 1353.10

Now try x = 42

y = -0.9x^2 + 76x - 250

y = -0.9(42)^2 + 76(42) - 250

y = 1354.4

Now try x = 43

y = -0.9x^2 + 76x - 250

y = -0.9(43)^2 + 76(43) - 250

y = 1353.9

We see that the largest profit happens when x = 42.

3 0
2 years ago
The regular price for a sweater is $48. The store is having buy one get one 1/2 off sale. If you buy 2 sweaters for that price w
IRISSAK [1]
25%


If you are buying 2 shirts for the same price, you have to calculate the cost of the shirt at half price first (1 piece of the pie) and then add it the original price (2 equal pieces of the pie since you just divided that to the price of the second shirt). That would be considered 3 out of 4 pieces off the pie or 75%. Your savings would be 25%.
4 0
3 years ago
Read 2 more answers
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