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crimeas [40]
2 years ago
11

Easy math please help

Mathematics
1 answer:
Vaselesa [24]2 years ago
3 0
A and D
Explanation: I did this problem in khan academy
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4^(x-1)+4^(x)+4^(x-1)=84
creativ13 [48]

Answer:

7.66

Step-by-step explanation:

Just open the parenthesis.

4x-4+4x+4x-4=84

Now simplify and solve

12x-8=84

12x=92

x= 7.66

3 0
3 years ago
A masonry contractor is preparing an estimate for building a stone wall and gate. He estimates that the job will take a​ 40-hour
kodGreya [7K]

Solution: Estimated time for the work is 40 hour work week.

Estimated payment to 3 laborers working 40 hours at cost $14 per hour is:

3\times 40\times 14= $1680

Estimated payment to 6 masons working 40 hours at cost $24 per hour is:

6\times 40\times 24= $5760

Estimated cost of material = $3143

Contractor wishes to make a profit of $500

Therefore, the mathematical expression that will give the estimated cost of the job is:

Cost = 1680+5760+3143+500

The estimated total cost is:

Cost =$11083




5 0
3 years ago
Read 2 more answers
Emily and Miranda are standing outside. Emily is 5 feet tall and casts a shadow of 28 inches. Miranda's shadow is 29.4 inches lo
Andre45 [30]
I think the answer is 5 feet 3 inches
8 0
3 years ago
Read 2 more answers
Charlotte works at an electronics store as a salesperson. Charlotte earns a 10% commission on the total dollar amount of all pho
Ymorist [56]

Answer:

I think it's 0.648

Step-by-step explanation:

10% of 4% of 162 = 0.648

5 0
2 years ago
PLEASE HELPPppp
sasho [114]

Answer: B

Hope this helps :)

5 0
3 years ago
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