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3 years ago

How many people were both 20 and Over and failed ? A.9 B.36 C.60 D.15

Mathematics

2 answers:

Valentin [98]3 years ago

7 0

Answer:

Step-by-step explanation:

90 - 30 = 60

60 - 45 = 15

d.15

sweet [91]3 years ago

5 0

Answer: D)15

Step-by-step explanation: Look at the totals first, 90 is the full total so subtract 30 from 90 and you get 60. Now look at the fail column, the only number is 45 so subtract 45 from 60 and you get 15.

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(-5,-3) (5,5)<br> slope<br> What is the slope ?

Setler [38]

Answer:

The slope is 10/8

Step-by-step explanation:

You would rise 10 units and you would run 8 units.

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3 years ago

Read 2 more answers

1. General Trades A roofer earns $24 per hour plus $36 per hour overtime. If he puts in 40 hours of regular time during a certai

snow_tiger [21]

Answer:

He should work $6\frac{2}{3}$ hours in overtime.

Step-by-step explanation:

Let x represents the number of hours of regular time and y represents the number of hours of overtime,

Since, earnings are $24 per hour for regular time and $36 per hour for overtime,

Thus, total earning = (24x + 36y) dollars,

Here, x = 40 hours and total earning = $ 1200,

By substituting the values,

1200 = 24(40) + 36y

1200 = 960 + 36y

240 = 36y

⇒ $y = 6\frac{2}{3}\text{ hours}$

Hence, he should work $6\frac{2}{3}$ hours in overtime.

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3 years ago

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almond37 [142]

Answer:

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7 0

3 years ago

The piecewise function f(x) is defined below. What is the value of f(–2)?

Usimov [2.4K]

$f(-2)=3$ , because $f(x)=3$ for $-2\leq x\ \textless \ 0$

3 0

3 years ago

Read 2 more answers

Kevin is 3 years older than Daniel. Two years ago, Kevin was 4 times as old as Daniel.

Allisa [31]

Let, the age of Daniel be x years and Kevin be y years.

Given, Kevin is 3 years older than Daniel.

So we can write the equation as y=x+3

Also given, 2 years ago Kevin was 4 times as old as Daniel.

2 years ago, Daniel's age = (x-2) years

2 years ago, Kevin's age = (y-2) years.

So we can write the equation as (y-2) = 4(x-2)

We have got the two equations

y = x+3 ..... equation 1

(y-2) = 4(x-2) ..... equation 2

Now we are plugging in the value of y from equation 1 to equation 2

x+3-2 = 4(x-2)

x+1 = 4(x-2)

Now we have to distribute 4 in the right side.

x+1 = 4x -8

We will have to take x in one side. so let's move 4x to the left side by subtracting it to both sides.

x -4x+1 = 4x-4x -8

-3x+1 = 0-8

-3x+1 = -8

Now we have to move 1 to the right side by subtracting 1 from both sides.

-3x +1 -1 = -8-1

-3x+0 = -9

-3x = -9

Now we can get x by moving -3 to the right side. As -3 is multiplied there so we can move it by dividing both sides by -3.

-3x/-3 = -9/-3

x = 3

So we have got the required answer. Daniel is 3 years old.

8 0

3 years ago