All categories

2 years ago

4 A game is being watched by 60 adults and some

Mathematics

1 answer:

Vladimir79 [104]2 years ago

5 0

Answer:

20 children.

Step-by-step explanation:

We can solve this using an equation or simple mental math:

The equation: x=children x+20=adults

x + (x+20) = 60

2x + 20 = 60

2x = 40

x = 20

Mental Math: 40 plus 20 is 60 and 40 is 20 more than 20 so there are 40 adults and 20 children.

You might be interested in

2x — бу = 12 х+ 10 = — 9

Serggg [28]

Answer:

x = -19; y = 25/3

Step-by-step explanation:

Step 1: solve the equation with only one variable

Isolate the variable (x)

x + 10 = -9

x = -9 - 10

x = -19

Step 2: input new information into the other equation

If x = -19, then:

2(-19) - 6y = 12

Isolate the variable (y)

-38 - 6y = 12

-6y = 12 + 38

-6y = 50

y = 50 ÷ 6

y = 50/6

Simplify

y = 25/3

5 0

3 years ago

The circle below represents one whole . …. What percent is represented by the shaded area ?

IgorC [24]

Answer:

50%

Step-by-step explanation:

shaded area = 2/4

shaded area as a percentage ;

2 / 4 x 100

= 1 / 2 x 100

= 1 / 1 x 50

= 50%

4 0

3 years ago

T(r+4)=28 solve for t pls help

Reptile [31]

Answer: 28/r+4

Step-by-step explanation: Divide each term by r + 4 and simplify

3 0

3 years ago

After painting the fence steve and janet realize that their house also needs painting. But steve will have to do the painting hi

gladu [14]

Answer:

Therefore, Steve will paint house for 20.6 days.

Step-by-step explanation:

We know that Steve determines that it would take them 9 days to paint the house together (if they were both healthy) and that it would take Janet (when healthy) 16 days to paint the house alone.

We conclude that in 1 day Janet painted 1/16 of the house. In nine days, Janet painted 9/16 of house.

So, 7/16 of house paint Steve in nine days.

We have the following proportion:

$\frac{7}{16}:9=1:x\\\\\frac{7}{16}x=9\\\\x=9\cdot \frac{16}{7}\\\\x=20.6$

Therefore, Steve will paint house for 20.6 days.

4 0

3 years ago

40 is 50 percent of which number

FinnZ [79.3K]

Answer:

Step-by-step explanation:

80 divided by 1/2 = 40 therefore 40 is 50% of 80

4 0

3 years ago