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arsen [322]
3 years ago
7

If 3 times a certain number is increased by 4 the result is 28. What is the number? If xis "the number," which of the following

equations could be used to solve for the number? 3 x + 4 = 28 KOE 3 X= 4 + 28 30 x + 4) = 28​
Mathematics
1 answer:
Dimas [21]3 years ago
8 0

Answer:

The first one (3x+4=28)

Step-by-step explanation:

3x+4=28

28-4=24

24/3=8

x=8

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What is the value of R, what is the value of EF
yarga [219]
9r - 6 = 8r + 3
r = 9
EF = 4r + 19 = 4(9) + 19 = 36 + 19 = 55

hope it helps
4 0
2 years ago
What are the dependent (y) and the independent (x) variables?
Alexandra [31]

Answer:

i donk know and i dont understand the question

Step-by-step explanation:

7 0
2 years ago
Rachel uses 1/3 cup of oil for every cake she bakes. If she used 4 cups of oil one day, she made __ cakes. If she used 2 cups of
Leno4ka [110]

First answer: 12

Second answer: 6

=================================================

How to get these answers

She uses 1/3 of a cup for 1 cake, so we have this ratio

1/3 cup : 1 cake

Multiply both sides by 3 and we end up with

1 cup : 3 cakes

Then multiply both sides by 4 to change "1 cup" to "4 cups" and we have

4 cups : 12 cakes which is the answer to the first part

-------------

For part 2, we'll follow the same steps as before, but instead of multiplying both sides by 4, we do 2 instead because we're dealing with 2 cups of oil.

1/3 cup : 1 cake

3*(1/3 cup) : 3*(1 cake)

1 cup : 3 cakes

2*(1 cup) : 2*(3 cakes)

2 cups : 6 cakes which is the answer to the second part

6 0
3 years ago
Read 2 more answers
winnie and kevin like to create their own triathlon courses to challenge each other. last weekend, winnie created a course that
shepuryov [24]
If you add all of the numerators together
3+57+13= 73
Then you would divide that number by 4
73/4= 18.25
So the course would be 18.25 or 18 1/4 miles long.
8 0
2 years ago
9. A television regularly costs $180, but it is on sale for 40% off. There is a
Alexandra [31]

Answer:

C $113.40

Step-by-step explanation:

100%-40%=60%

$180x60/100

=$10800/100

=$108

100%+5%(tax)=105%

$108x105/100

=$11340/100

=$113.40 (C)

3 0
3 years ago
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