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aalyn [17]
4 years ago
12

What is the answer to 3x - 12 £ 9

Mathematics
1 answer:
frez [133]4 years ago
3 0
If you meant 3x-12=9, the answer is x= 7
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A store buys 19 sweaters for $190 and sells them for $532. How much profit does the store make per sweater?
umka21 [38]

Answer:

profit is $18 per sweater

Step-by-step explanation:

if a store buys 19 sweaters for $190 then they are paying $10 per sweater

if a store sells 19 sweaters for $532 they they are receiving $28 per sweater

Since they must pay $10 per sweater then their profit is $18 per sweater

($28-$10)

4 0
2 years ago
Read 2 more answers
Which of the following are exterior angles check all that apply
Inga [223]
The exterior angles are:
- A
- C
- E
- F

Hope this helps! :)
8 0
3 years ago
Read 2 more answers
Please help & explain!!!!!!!
Naily [24]
F(-3) means x = -3

Look at the functions above, if x <= - 3 then use F(x) = 7 - x

so
F(-3) = 7 - x, replace x = - 3 into the function
F(-3) = 7 - (-3)
F(-3) = 7 + 3
F(-3) = 10
7 0
3 years ago
The number of accidents per week at a hazardous intersection varies with mean 2.2 and standard deviation 1.4. This distribution
ankoles [38]

Answer:

a) Normal Distribution

b) 0.146

c) 0.070

Step-by-step explanation:

We are given the following information in the question:

The number of accidents per week at a hazardous intersection varies with mean 2.2 and standard deviation 1.4

a) \bar{x}: mean number of accidents per week at the intersection during a year (52 weeks)

According to central limit theorem, as the sample size becomes larger, the distribution of mean approaches a normal distribution.

Since we have a large sample, the approximate distribution of \bar{x} is a normal distribution with

\text{Mean} = 2.2\\\text{Standard Deviation} = \displaystyle\frac{\sigma}{\sqrt{n}} = \frac{1.4}{\sqrt{52}} = 0.19

b) P(mean is less than 2)

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(x > 610)

P( \bar{x} < 2) = P( z < \displaystyle\frac{2 - 2.2}{0.19}) = P(z < -1.052)

Calculation the value from standard normal z table, we have,  

P(\bar{x} < 2) = 0.146

c) P(fewer than 100 accidents at the intersection in a year)

P(x < 100)

P( \bar{x} < \frac{100}{52}) =P(\bar{x} < 1.92) =P(z < \displaystyle\frac{1.92 - 2.2}{0.19}) = P(z < -1.473)

Calculation the value from standard normal z table, we have,  

P(x

7 0
3 years ago
Write in standard form<br> y-3x=1
kvasek [131]
The standard form is y=mx+b.
With y-3x=1, you're trying to get y by itself.
Start with adding 3x to both sides to get y=3x+1
5 0
4 years ago
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