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Zepler [3.9K]
4 years ago
7

Show the steps on solving

Mathematics
1 answer:
inna [77]4 years ago
3 0
0.3(12x-16) = 0.4(12-3x)
0.3 is easier written as 3/10 and 0.4 easier written as 2/5, but in this case, 4/10 would help with the other fractions

3*12x/10-16*3/10 = 12*4/10 - 3x*4/10

36x/10-48/10 = 48/10 - 12x/10

since all the fractions are divided by 10, you can remove them totally by multiplying everything with 10

36x-48 = 48 - 12x

36x + 12x = 48 + 48

Here we moved the numbers, by adding them to both sides

48x = 48*2
we can find x by dividing by 48

x = 48*2/48
since we have a 48 both over and under the fraction we can cross out both

x = 2/1 = 2
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Brian has DVDs and CDs. The number of CDs he has can be modelled with the formula C = 2D + 11, where C represents the number of
wel

Answer: <u> 15 DVDs</u>

Step-by-step explanation:

C = 2D + 11

41 = 2D + 11

2D = 30

D = 15 DVDs

7 0
2 years ago
24 is 75 percent of what number?
KonstantinChe [14]

18

the calculated percentage of 75 anf 24 is 18

7 0
3 years ago
A carton of eggs costs $2.90 and a package of bacon costs $3.10. How much
Dominik [7]

Answer:

$8.90

Step-by-step explanation:

((2)(2.90))+(3.10)= $8.90

3 0
3 years ago
Read 2 more answers
1.An ice cream cone has a radius of 3 inches and a height of 5 inches. Which measurement is the closest to the volume in cubic i
Murljashka [212]
First question
Volume = height * radius*radius*3.14
5*3*3*3.14 = 141.3 in3

Second qustion
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4 0
3 years ago
Read 2 more answers
P:-3x + 8x - 5x = x<br><br> q: (3x)(5y) = 15xy<br><br> Which of the following statements is false?
Varvara68 [4.7K]

Answer: Statement p is false.

Step-by-step explanation:

In both cases, we need to isolate the variables:

p: -3*x + 8*x - 5*x = x

   (-3*x - 5*x) + 8*x = x

    -8x + 8*x = x

        0 = x

This will be true only for one value of x, so this is not always true, which means that the statement is false.

q: (3*x)*(5*y) = 15*x*y

let's solve the left side:

  3*x*5*y = 15*x*y

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   15*x*y = 15*x*y

This is true for every value of x and y, then this statement is true.

5 0
2 years ago
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