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ArbitrLikvidat [17]
2 years ago
12

Which algebra tiles are used in this equation: 4x + 7 = 23

Mathematics
2 answers:
valkas [14]2 years ago
5 0

Answer:

23 - 7 = 16

4*4=16

x=4

weqwewe [10]2 years ago
4 0

Answer:

4x+7=23

4.4+7=23

Step-by-step explanation:

23-7=16

16/4=4

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Manny bought a brand new car in 2012 for $28,750. If the car depreciates by 12% each year, write an exponential function to mode
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The exponential formula for this situtation will be given by:
f(x)=ae^(-bx)
where:
a=initial price
b=rate
x=time in years
hence the formula will be:
f(x)=28750e^(-0.12x)
thus the value of the car in 2018 will be:
x=2018-2012=6 years
thus
f(6)=28750e^(-0.12*6)
f(6)=$13,994.13
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3 years ago
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3 years ago
Please help with this question
Lisa [10]

Answer:

B

Step-by-step explanation:

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3 years ago
How do I find a perimeter
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3 years ago
Read 2 more answers
A DVD rental store wants to know what proportion of its customers are under age 21. A simple random sample of 400 customers was
Volgvan

Answer:

The sample proportion \hat{p} is within 0.03 of the true proportion of customers who are under age 21 is 0.803

Step-by-step explanation:

Total no. of customers = n = 400

We are given that the true population proportion of customers under age 21 is 0.68.

So, p =0.68

q=1-p=1-0.68=0.32

Standard deviation =\sqrt{\frac{pq}{n}}=\sqrt{\frac{0.68 \times 0.32}{400}}= 0.023

We are supposed to find  the probability that the sample proportion \hat{p} is within 0.03 of the true proportion of customers who are under age 21 that is , what is the probability that \hat{p}is between 0.68 - 0.03 and 0.68+ 0.03

P(0.65 < X < 0.71) = P((\frac{0.65-0.68}{0.0233}) < Z < (\frac{0.71-0.68}{0.0233}))

Using Z table

= P(-1.2875 < Z < 1.2875)= 0.803

Hence  the sample proportion \hat{p} is within 0.03 of the true proportion of customers who are under age 21 is 0.803

5 0
3 years ago
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