MATHEMATICS MIDDLE SCHOOL

Out of the 40 students in the 7th grade 60% of the students carry cell phones. What fraction of the students carry a cell phone?

Answers

Answer 1
Answer: if you have 60% out of 40 students that is 24 students
Answer 2
Answer: The answer is 24 students. The fraction is 24/40. The fraction in simplest form is 3/5.

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I don’t understand how to solve it

Answers

Answer:

$3.19

Step-by-step explanation:

so he starts with $18.90 and we know that he spent $2.95. So we will subtract  $2.95 from $18.90. So we are left with $15.95. But now its says he bought 5 items with $15.95. So we will divide 15.95 by 5. So the price of the item that he bought 5 of is $3.19

If you are at a higher level you can use this method:

make and equation of: 5x + 2.95 = 18.90

with this you would subtract 2.95 and then divide by 5 just like we did above.

Answer:

d. 15.95

Step-by-step explanation:

So if one item cost $2.95 and he bought 5 other items that were the same price, we first have to subtract $2.95 from the total which is $18.90.

18.90 - 2.95 = 15.95

Now, to find the cost of the other five items we divide the amount of money left by 5.

15.95 / 5 = 3.19

So each of the other five items costs $3.19.

To find the total cost of the five items together, we multiply 3.19 by 5.

3.19 x 5 = 15.95

Bruce is getting materials for a chemistry experiment. His teacher gives him an container that holds 0.25 liter of a blue liquid. Bruce needs to use 0.4 of this liquid for the experiment. How much blue liquid will Bruce use?

Answers

0.4\cdot0.25=0.1 \text{ l}

A rectangle has a length six inches less than twice its width. If the perimeter of the rectangle is 54 inches, find the dimensions.​

Answers

Answer:

let the width of the rectangle be x inches

then the length would be 2x-6

as perimeter =2(l+b)

putting values in formula

perimeter = 2(2x-6+x)

p= 6x-12 but as perimeter p=54inches so

54=6x-12

54+12=6x

66=6x

x=66/6

x=11 inches

width is 11inches and length is 2x-6= 2(11)-6=22-6=16 inches

Step-by-step explanation:

A school needs to raise $2700. A nearby store promises to donate twice theamount the students raise. How much money do the students need to raise?

Answers

1350 dollars raised at least
They need to raise $900.

. An item is priced at $13.66. If the sales tax is 6%, what does the item cost including sales tax?

Answers

13.66 x 1.06 = $14.48 (2dp) 

A gift basket that contains jars of jam and packages of bread mix costs $45. There are 8 items in the basket. Jars of jam cost $6 each, and packages of bread mix cost $5 each. Write and solve a system of linear equations to find the number of jars of jam and the number of packages of bread mix in the gift basket. Let xx represent the number of jars of jam and let y represent the number of packages of bread mix.

Answers

8 items
jams+breadmix=8
x+y=8

total value is 45
value of jam=x times cost per jam=x times 6=6x
value of bread=y times cost per bread=y times 5=5y

total value=bread value+jam value
45=5y+6x


we have
x+y=8
6x+5y=45
solve

multiply first equaton by -5
-5x-5y=-40

add to first equation

-5x-5y=-40
6x+5y=45 +
1x+0y=5

x=5
subsitute
x+y=8
5+y=8
y=3


5 jars of jam
3 jars of bread mix
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