Answer:
D.
Step-by-step explanation:
1. Answer A:
15 students signed up for violin lessons (4 boys + 11 girls)
15 / 70 = approx. 21% of the class.
Answer A says 28%, so this is incorrect.
2. Answer B:
17 students signed up for drum lessons (11 boys + 6 girls)
17/70 = approx. 24%
B says 17% signed up for drums, so this is incorrect.
3. Answer C.
Wrong because more girls signed up for piano lessons (15 girls, whereas only 9 boys signed up for piano)
4. D. The same percent of boys and girls are taking guitar lessons.
Get the total number of boys and girls in the class (just add the results for each separately for all instruments)
Boys: 11 + 6 + 9 + 4 = 30
Girls: 6+8+15+11 = 40
6 out of 30 boys signed up for guitar
6/30= 20%
8 out of 40 girls signed up for guitar
8/40 = 20%
Answer is D
Answer:
4. 2
Step-by-step explanation:
Subtitue the value of variable into the equation and simplify 2
80 miles
35+.25x is less than or equal to 55
55-35= 20
20/.25 =x
x= 80
Answer:
y = 5-3x
Step-by-step explanation:
First, you want to divide both sides of the equation by 3, so we have the equation in the simplest form. Thus, we have an equation: 3x + y = 5.
Slope intercept form means the equation is in the y = mx + b form. In this case, y is y, m is 3 (coefficient of x) x is x, and b is 5. So, subtracting 3x from both sides means we have our answer of y=5-3x.
Answer:
3/10
3/10
Step-by-step explanation:
0,1,2,3,4,5,6,7,8,9 are in a box
odd primes are 3 and 5 and 7 ( 1 is neither prime nor composite)
There is a total of 10 numbers
P( odd prime) = number of odd primes / total = 3/10
perfect squares greater than 0 are 1,4,9
P( perfect squares) = number of perfect squares / total = 3/10
