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adelina 88 [10]
3 years ago
14

of 140 seventh grade students, 15% earn the presidential physical fitness award. How many students earn the award

Mathematics
2 answers:
mafiozo [28]3 years ago
6 0
10% = 14 , 5% = 7 , 14+5= 21 , so 21 won the award 
4vir4ik [10]3 years ago
4 0
0.15*140=21

21 is 15% of 140
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Jeff was already 7 miles out of town when his sister
Nikolay [14]

The sister catches up Jeff after 2 hours

Step-by-step explanation:

We can write Jeff's position and his sister position at time t using the following expressions:

- Jeff position:

x_j(t) = 7 + 2.5 t

where:

7 is the initial position of Jeff when his sister sarts chasing him

2.5 is Jeff's velocity (in miles/hour), so its position increases by 2.5 miles for each hour

t is the time measured in hours

- Sister position:

x_s(t) = 6t

where

6 is the sister velocity (her position increases by 6 miles for every hour)

t is the time measured in hours

The sister catches up Jeff when the two positions are equal, so

x_j(t) = x_s(t)\\7+2.5t=6t

And solving for t,

7+2.5t-2.5t=6t-2.5t\\7=3.5t\\t=\frac{7}{3.5}=2 h

So, the sister catches Jeff after 2 hours.

Learn more about speed:

brainly.com/question/8893949

#LearnwithBrainly

5 0
3 years ago
What are the coefficients in<br> 3x-2+5y
Norma-Jean [14]

Answer:

Step-by-step explanation:

Move −2.

3x+5y−2

3 0
2 years ago
X - 3y = 1 <br> 3x - 5y = 11
Anon25 [30]
The answers are...
x=7
y=2
7 0
3 years ago
Read 2 more answers
PLS HELP ME ASAP!!! THANKS!!
MariettaO [177]
I believe it’s a and c
5 0
3 years ago
Which of the following best describes the relationship between (x-3) and the polynomial x^3+4x^2+2?
Anna71 [15]
This is the concept of polynomials, to get the relationship between the (x-3) and (x^3+4x^2+2) we shall proceed as follows;
we first test if (x-3) is a polynomial;
x-3=0
thus;
x=3
substituting the value of x in the polynomial we get:
(3)^3+4(3)^2+2
=65
since the result is not equal to 0, we conclude that there is no relationship between (x-3) and the polynomial. The answer is B. (X-3) is not a factor
7 0
3 years ago
Read 2 more answers
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