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Mamont248 [21]
3 years ago
14

In a class, 45 students take the SAT exam. The number of boys is 7 more than the number of girls

Mathematics
2 answers:
velikii [3]3 years ago
6 0
There are 26 boys and 19 girls,
Take away 7 from 45 to get 2g(# of girls)
45-7=38 38=2g To get to # of girls,find just one g
38/2=19 so 19 girls
45-19=boys 45-19=26 boys
Natasha_Volkova [10]3 years ago
3 0
B + g = 45

b = g + 7

b = 26
g = 19

26 + 19 = 45
26 - 19 = 7

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It is predicted that by 2050 there will be 10^10 people living on earth. approximatrly will be 10^12 trees. how many trees for e
Nastasia [14]

Interesting question. Does that mean near the end of humanity?

Solution 1:

10^10 = 1,000,000,000

10^12 = 100,000,000,000

100,000,000,000/1,000,000,000 = 100 trees per person

Solution 2:

10^12 / 10^10  ---  10^10 / 10^10

10^2/1 = 10^2 = 100 trees per person

8 0
3 years ago
Which graph shows the points (–3, 5) and (4, –3) plotted correctly?
Nana76 [90]

Answer:

Step-by-step explanation:

This is clearly a linear relationship.  If Alex rented the movie for 0 days, he'd owe nothing.  If he paid $6 for a 3-day rental, the slope of this line would be m = rise / run = $6/(3 days) = $2/day, which is positive.

Then the equation for this graph is C(x) = ($2/day)x, where x is the number of days for which the movie is rented.

Using this formula, we find three particular points on the graph:

(1, $2), (2, $4), (3, ($6)

8 0
3 years ago
If b/a=c/b=d/c=2/3, find the value of a:b:c:d
leva [86]

Answer:

the ratio would be 6.75:4.5:3:2

Step-by-step explanation:

replace d and c with

d=2 and c=3

Then using proportion multiplication, you will find that b is 4.5

now replace all b with 4.5.

Then again using proportion multiplication, you will get a is 6.75.

Plug in a, b, c, d in the ratio and you get 6.75:4.5:3:2

5 0
2 years ago
What is the positive square root of 16?​
vekshin1

Answer:

4

Step-by-step explanation:

because The square root of 16 is 4, which is a rational number.

5 0
2 years ago
Read 2 more answers
Never been good at similar figures.. xP
Otrada [13]
1 is false, 2 is true, 3 is false, 4 is false
5 0
2 years ago
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