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2 years ago

there are 4/7 as many girls as there are boys. There are 66 students in the fifth grade. How many students are girls?

Mathematics

1 answer:

zhenek [66]2 years ago

5 0

My guess is 24 girls.

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Justin is 3 years older then sam, and justin's age in 2 years will be twice what sam's age was 3 years ago. find their present a

sineoko [7]

Justin 11 and sam 5.5

8 0

3 years ago

Please help if you know, thanks!

jonny [76]

The number of 8th grade students have dropped by 25% this year

3 0

3 years ago

Round off 3. 55 to one significant figure

Anika [276]

Answer:

3.6

Step-by-step explanation:

We must first clarify how a number is rounded.

To round a number to unity we have to look at the first number after the comma.

If this number is less than 5 (1, 2, 3, 4) we should not do anything, but if that number is 5 or greater (5, 6, 7, 8, 9) we must add a unit to the number.

That is to say:

<5 do nothing

=> 5 round to the next number (+1)

So in the case of 3.55 it would be.

3.55 = 3.6

8 0

3 years ago

A family built a house and wanted to put down in their rectangular yard. The sod costs $0.32 per square foot plus 10 per square

sammy [17]

Answer:

The total cost of purchasing and laying sods in the rectangular yard is $2,146.67

Step-by-step explanation:

We are given the following in the question:

Dimensions of rectangular yard:

Length = 50 feet

Width = 30 feet

Area of rectangular yard =

$A = \text{Length}\times \text{Width}\\A = 50\times 30\\A = 1500\text{ square feet}$

Cost of sod = $0.32 per square foot

Total cost of sod =

$C_1 = \text{Unit cost of sod}\times \text{Area of yard}\\C_1 = 0.32\times 1500\\C_1 = 480\$$

Cost of laying sods = $10 per square yard

Total cost of laying sod =

$C_2 = \text{Unit cost of laying sod}\times \text{Area of yard}\\\\\text{1 square yard}=\dfrac{1}{9}\text{Square foot}\\\\C_2 = 10\times \dfrac{1500}{9}\\\\C_2 = 1666.67\$$

Total cost of purchasing and laying the sod =

$C = C_1 + C_2\\C = 480 +1666.67\\C = \$2,146.67$

Thus, the total cost of purchasing and laying sods in the rectangular yard is $2,146.67

3 0

3 years ago

7/8 = y/11 solve for y

olasank [31]

7/8 = y/11

so multiply 11 to both sides of the equation

so now its (7*11)/8= y

y=77/8

if decimal then 9.625

hope that helps

5 0

3 years ago

Read 2 more answers