All categories

3 years ago

There are 500 children in elementary.Today 25 children are away.what percentage are present?

1 answer:

4 0

This can be solved using a proportion

100 : 500 = x : 475
100 percent is 500, x percent is based on the remaining 475 students
100 x 475 = 500x
47500 = 500x
x= 47500/500
x=95

95% of students are present.

You might be interested in

29. Fifty percent of the parallelogram is shaded. What is the area of the shaded region?

Butoxors [25]

Answer:

25 cm

Step-by-step explanation:

the whole parallelograph is 5 times 10 which equals 50. Devide that by 2 and you get 25

5 0

3 years ago

Read 2 more answers

The math department is putting together an order for new calculators. The student are asked what model and color they prefer

kenny6666 [7]

Answer:

The second option

Step-by-step explanation:

Please find attached the complete question in the attached image

the proportion of students that like the silver calculator is 0.4 while the proportion of students that like the black calculator is 0.6. More students like the black calculator

the proportion of students that prefer the black model 77 calculator is 0.3 while the proportion of students that prefer the silver model 55 is 0.25. More students prefer the black model 77 calculator

the proportion of students that prefer the model 66 calculator is 0.15 while the proportion of students that prefer the model 55 calculator is 0.35. More students prefer the model 55

the fewest student prefer the silver model 66 calculator because it has the lowest proportion

8 0

2 years ago

Write a quadratic function f whose zeros are - 5 and 7.

weeeeeb [17]

Our two binomials are (X-5)(X-7)

If we FOIL those two terms [x*x = x2; x*-7 = -7x; x*-5 = -5x; -5*-7 = 35] and combine the like terms, we're left with one of many quadratic function
Answer
x2-12x+35

3 0

3 years ago

Given the function f(x)=2x-1<br> Evaluate: <br>a) 2f(x) <br> b) f(2x)

Dmitrij [34]

Answer:

a) 2f(x) = 4x - 2

b) f(2x) = 4x - 1

Explanation:

Given function:

f(x) = 2x - 1

a) 2f(x)

2f(x) = 2(2x - 1)

= 4x - 2

b) f(2x)

f(2x) = 2(2x) - 1

= 4x - 1

3 0

1 year ago

What is the product of z1 and z2 if

MaRussiya [10]

Answer:

308[cos(45) + isin(45)]

Step-by-step explanation:

z1×z2:

Modulus: r1 × r2

= 7×44 = 308

Argument: theta1 + theta2

= -70 + 115 = 45

z1z2 = 308[cos(45) + isin(45)]

z1z2 = 154sqrt(2) + (i)154sqrt(2)

sqrt: square root

8 0

3 years ago