There are 40 pupils in a class. There are x more girls than boys. How many boys are there in terms of x?

Answers

Answer 1

Answer:

The number of boys is 40 - Number of girls - x .

What is Algebra?

A branch of mathematics known as algebradeals with symbols and the mathematical operations performed on them.

Variables are the name given to these symbols because they lack set values.

In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmeticoperations.

Given:

Total student in class = 40

Number of Girls= Number of boys + x

Number of boys= Number of Girls - x

So, Out of 40 number of boys

= 40 - Number of girls

= 40 - ( Number of girls - x)

= 40 - Number of girls - x

Hence, the number of boys is 40 - Number of girls - x .

Learn more about Algebra here:

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Answer 2

Answer: (40 - x) ÷ 2

this is because we first deduct the difference

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What is the value of 9(n+2)−5n for n=14?
3
9
10
19

Answers

If you want to know the value of a function, you need to substitute the variable (here n) for the value:

so in the function

9(n+2)−5n

we substitute n with 14:

9(14+2)−5*14

first calculate the inside of the bracket:

9*16−5*14

9 times 16 is 144

144-5*14

5*14 is 70, so we have

144-70=74

so the answer should actually be 74!

Perhaps you mistyped the questions? can you check it again, please?

What is the unit rate for $32.05 for 15 gallons

Answers

Divide $32.05 by 15 for the unit rate per gallon. So 32.05/15= $2.14 per gallon.

6 1/5 + (-7 3/5) HELP ME FAST

Answers

Answer:

Step-by-step explanation:

Answer this question correctly and you'll get a good 13 points! Please help me! :) Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 4 h, and Car B traveled the distance in 4.5 h. Car B traveled 5 mph slower than Car A.How fast did Car B travel? How many MPH?

Answers

Time = Distance / Speed OR Distance = Time * Speed OR Speed = Time * Distance

Since both cars travelled the same distance; it is safe to have this formula to get the actual distance travelled.

Let X = distance in MPH

Car A = Car B
4 hours * X    = 4.5 hrs * (X - 5MPH)
4X    = 4.5(X-5)
4X = 4.5X - 22.50
4X - 4.5X = -22.50
-0.5X = -22.50
X = -22.50 / -0.5
X = 45 MPH

Speed of Car B = 4.5 hrs * (45-5)
   = 202.50 - 22.50
Speed of Car B = 180 MPH

TO CHECK
Speed of Car A = 4hrs * 45 MPH
Speed of Car A = 180 MPH

The measures of two supplementary angles are in of ratio of 2:3. Find the two angles