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Drupady [299]
3 years ago
12

Rebecca charges $7.50 per hour to babysit. She babysat for 4.5 hours on Saturday, and 2.75 hours on Sunday. How much will Rebecc

a make babysitting altogether?
Mathematics
1 answer:
Aleks04 [339]3 years ago
7 0

Answer:

She will make $54.375

Step-by-step explanation:

Here, we are interested in calculating the a total amount of money that was made by Rebecca given the number of hours she has babysat and her charges per hour.

Firstly, we need to get the total number of babysitting hours;

That would be 4.5 hours + 2.75 hours = 7.25 hours

Now to get the total amount charged = number of hours * amount per hour

= 7.25 * 7.5 = $54.375

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8.46 If 100 is decreased by a% and the result is decreased by b%, then what is the total percent decrease (in terms of a and b)?
Marysya12 [62]

Answer:

The total percent decrease is $a+b-\frac{a b}{100}$

Step-by-step explanation:

  • We are given with a word problem
  • We are asked to find the total percentage decrease
  • We can do this in two steps

         Step 1: Finding the two percentage decrease

         Step 2: Finding their difference

Step 1 of 2

Let the decrease by a% be 100-a

Then b% decrease is

$$\begin{aligned}\frac{b}{100} \times(100-a) &=\frac{100 b-a b}{100} \\\frac{100 b}{100}-\frac{a b}{100} &=b-\frac{a b}{100}\end{aligned}$$

Step 2 of 2

The percentage difference between the two percentages is,

$$\begin{aligned}&(100-a)-\left(b-\frac{a b}{100}\right)=100-a-b+\frac{a b}{100} \\&100-a-b+\frac{a b}{100}=100-\left(a+b-\frac{a b}{100}\right)\end{aligned}$$

Since 100 is the total percent $a+b-\frac{a b}{100}$ is the percentage decrease.

3 0
2 years ago
PLEASE HURRY
kiruha [24]
The answer (I believe) Is 6.

bc you do this...

x+(5x-6)+(5x-6)=54

then solve
8 0
3 years ago
If 512+14=x then x=23 Question 10 options: True False
Inessa05 [86]
False!

if you plug in x, the equation would be 512+14= 23 which is incorrect. x would have to equal 526 for this statement to be considered true.
3 0
3 years ago
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