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Keith_Richards [23]
3 years ago
6

PLZ HELP ME!!!!!!

Mathematics
1 answer:
katrin [286]3 years ago
3 0
2/3 of an hour = 1/20 mile
3/3 of an hour = 3/40 mile
Answer: A
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Please help!! I don't get it!
Gre4nikov [31]

Answer:

64 times 7.5 and you will get your answer

Step-by-step explanation:

16*4=64

64*7.5=x

x is what you need to find

8 0
3 years ago
Adam had 91 dollar. If he spent 21 dollars on new books, what is the ratio of money he still has to money he's spent?
Alik [6]
1. Ratio- 91:21
2. Reduce- the common factor is 7
3. Answer- 13:3
3 0
3 years ago
Read 2 more answers
two high school students are hired to rake leaves. They will work a couple hours each afternoon until the job is completed. They
Schach [20]

Answer:

x = 14 days

Step-by-step explanation:

To answer the question, find a function that represents the payment mode of plan A and an equation that represents the mode of payment of plan B.

For Plan B the payment is constant every afternoon, $ 11.5 (or 1150 cents) so the equation to represent this form of payment is as follows:

A = 1150x (with units in cents)

This equation represents the line of a line of slope 1150, which passes through point (0,0). Where x is the number of days {1, 2, 3 ....}

In form of payment B, the amount of payment is doubled each day. And the first payment is 2 cents. Therefore this model is represented by an exponential base 2 equation of the form:

B = (2) ^ x

Where x represents the number of days, which is always greater than 0 {1, 2, 3, 4 ...}

To know in which day the salary will be approximately the same we equate both equations and we clear x.

A = B

1150x = (2) ^ x\\1150x- (2) ^ x = 0

It is a somewhat difficult equation to solve, so I recommend iterating to get a value where the function approaches 0 (when this difference is zero it means that the A and B salaries are the same).

Suppose

x = 13 days

1150(13) - (2) ^ {13} = 6758cents

It is not equal to 0.

Let's try with x = 15

1150(15) - (2) ^ {15} = -15518 cents

Then the value that makes the function zero is between x = 13 and x = 15

Let's try with x = 14

1150(14) - (2) ^ {14} = -284 cents = 2.84 $ difference. X = 14 is the whole number where functions A and B are closer together (the salary is approximately the same). Therefore the answer is

x = 14 days

4 0
3 years ago
A machine packs at a constant rate of 2/3 of a box every 1/2 minuet. What’s is the number of boxes per minute that’s the machine
lions [1.4K]
For this case what we can do is the following rule of three:
 2/3 of a box ------> 1/2 minutes
 x of a box ---------> 1 minute
 Clearing x we have:
 x = (1 / (1/2)) * (2/3)
 Rewriting:
 x = 2 * (2/3)
 x = 4/3
 Answer:
 the number of boxes per minute that the machine packs is:
 x = 4/3
4 0
3 years ago
I need to solve it but don't know how
Agata [3.3K]
You can take out 2x from both sets making 4x+5 since there is no other number or variable than can simplify the sets equally the GCF is 2x
8 0
3 years ago
Read 2 more answers
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