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lapo4ka [179]
3 years ago
10

Some one explain this? Plz

Mathematics
2 answers:
mars1129 [50]3 years ago
6 0

Answer:

D

Step-by-step explanation:

Just multiply 23.50 by each one and you're done!

ki77a [65]3 years ago
3 0

Answer:

your answer is D because the unit rate is 23.50 is what it increases every time

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Bill can paint a small house in 3 days, Sharon can paint a small house in 4 days and Wilber can paint a small house in 5 days. H
Paraphin [41]

To solve this problem, let us say that the action of totally painting a small house is called “1 job”. Therefore the rates of each person in painting the small house are:

Bill = 1 job / 3 days = 1 / 3

Sharon = 1 job / 4 days = 1 / 4

Wilber = 1 job / 5 days = 1 / 5

 

Therefore the total rate is calculated by simply adding the rates of the three.

(1 /  3) + (1 / 4) + (1 / 5) = 1 / x

where x is the number of hours it take if all them paint together

 

Calculating for by multiplying both sides by 60:

60 [(1 /  3) + (1 / 4) + (1 / 5) = 1 / x]

(60/3) + (60/4) + (60/5) = 60 / x

20 + 15 + 12 = 60 / x

47 = 60 / x

x = 60 / 47 hours

 

 

Answer:

60/47 hours

7 0
4 years ago
Im doing decimals greatest to least and i need help with number 12 and 13
erma4kov [3.2K]

(I know there isnt any real problem here to solve, but heres a tip on how to solve greatest to least with decimal problems)

1. Just because a number looks big, doesn't mean it is big

Example: 1.00000000000001 < 1.1

just look at the numbers ^ and dont just hastily read it over assuming that 1.1 is smaller because it "has less digits"

2. Negative numbers are... opposite. and they are less than positive numbers

-3.4 > -4.1

Why is this? Well, if you look on a line, with the point 0 in the middle, you can see that -3.4 is not as far away from 0 as -4.1 is. So the idea is to apply opposite logic for negative numbers

I hope these tips helped!! :D

3 0
3 years ago
Read 2 more answers
Name:
inessss [21]

Step-by-step explanation:

is it like this ? no diagrams ?

6 0
3 years ago
Ricky earns $8.50 per hour at his mothers office. He Plans on working 12.5 hours this week how much money will Ricky earn?
soldi70 [24.7K]

Answer:

$106.25

Step-by-step explanation:

earns in 1 hour = $8.50

earns in 12.5 hr=  $8.50*12.5= $106.25

5 0
4 years ago
Find the equation of a line that contains the points (4,−1) and (−1,−4). Write the equation in slope-intercept form, using fract
olga_2 [115]

Answer:

y = 3/5x - 17/5

Step-by-step explanation:

slope formula: (y₂ - y₁) / (x₂ - x₁)

First, plug in these values of the two given points.

(-4 - (-1)) / (-1 - 4)

Simplify within the parentheses.

(-4 + 1) / (-1 - 4)

(-3) / (-5)

3/5

This is your slope. Plug this into a standard slope-intercept equation: y = mx + b

To find b, we want to plug in a value that we know is on this line: in this case, I will use the second point (-1, -4). Plug in the x and y values into the x and y of the standard equation.

-4 = 3/5(-1) + b

Multiply.

-4 = -3/5 + b

Add 3/5 to both sides. -- To add it easier, <em>convert 4 to a have a denominator of 5</em>.

-20/5 = -3/5 + b

-20/5 + 3/5 = b

-17/5 = b

Now, plug this into your standard equation.

y = 3/5x - 17/5

Check this equation by plugging in the <em>other point you did not use</em> (4, -1)

-1 = 3/5(4) - 17/5

-1 = 12/5 - 17/5

-1 = -5/5

-1 = -1

Your answer is correct!

Hope this helps!

6 0
3 years ago
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