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Vikki [24]
3 years ago
11

In a group of 54 children, there are twice as many boys as girls how many girls are there

Mathematics
1 answer:
vlabodo [156]3 years ago
7 0
2x + x = 54   wher x = number of girls

3x = 54 
x = 18 

18 girls

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If sin(x) = cos(y) for acute angles x and y, how are the angles related?
Vesnalui [34]

Answer:

b. complementary

Step-by-step explanation:

-Complementary angles are angles that add up to 90°.

-These are usually the two acute angles in the right triangle.

#To verify, lets take the two angles 30° and 60°:

Cos \ 60\textdegree=0.5\\\\Sin \ 30\textdegree=0.5\\\\\therefore Sin \ 30\textdegree=Cos \ 60 \textdegree=0.5

#We can reverse as:

Sin \ 60\textdegree=0.86603\\\\Cos \ 30\textdegree=0.86603\\\\\therefore Sin \ 60\textdegree=Cos \ 30\textdegree=0.86603

Hence, two angles are said to be complimentary if they sum up to 90°.

6 0
3 years ago
a taxi service charges an initial fee of $5 plus $1.80 per mile. How many miles can you travel for $12
user100 [1]
First you need to write an equation or an inequality.

5+1.80x<=12 
the x here is how many miles you are paying for, now you just solve for x. 

5+1.80x<=12
-5                 -5

1.80x<=7
/1.80         /1.80
x<=3.8

you can travel only three whole miles, you do not have enough money to go four full miles.
4 0
3 years ago
Can u guys PLEASE explain the difference between 2 x 10 to the power of 4 and 2 to the power of 4
Alexxx [7]

Answer:

see explanation

Step-by-step explanation:

2 × 10^{4}

= 2 × 10 × 10 × 10 × 10

= 2 × 100 × 100

= 200 × 100

= 20000

And

2^{4}

= 2 × 2 × 2 × 2

= 4 × 4

= 16

7 0
3 years ago
A carpenter worked for 4 days to finish a repair job. She charged $825 for 15 hours plus $278 for materials. What is the carpent
harina [27]
29. A carpenter worked for 4 days to finish a repair job. She charged $825 for 15 hours plus $278 for materials. What is the carpenter's rate per hour? Let’s start solving: => 825 dollars + 278 dollars = 1 103 dollars is the total payment a carpenter have received => 15 hours is the total hours he worked => 1 103 / 15 = 73.5 dollars per hour. This is already including the material or equipment fee.
3 0
3 years ago
Read 2 more answers
Joan is hiking. She wants to cover 1,600 feet. She hikes 600 feet every 3 hours.
dimaraw [331]
Y=200x. it will take joan 8 hours to hike 1600 ft.
4 0
3 years ago
Read 2 more answers
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