Ask question

Ask question

All categories

My name is Ann [436]

2 years ago

13

3 Fred is playing tennis. For every 2 of his serves that land in, 3 serves land out. If he hit 30 serves in, how many serves lan

ded out? A 90 B. 6 C. 180 D. 45

2 answers:

sineoko [7]2 years ago

6 0

Answer:

d

Step-by-step explanation:

2:3 = 30:45

blagie [28]2 years ago

4 0

2 serves in..............3serves out
30serves in...............x serves out

2x=30* 3
x=30*3/2= 45 serves out

You might be interested in

A room contains three urns: u1, u2, u3. u1 contains 3 red and 2 yellow marbles. u2 contains 3 red and 7 yellow marbles. u3 conta

Archy [21]

Answer:

$\dfrac{11}{30}$

Step-by-step explanation:

Urn U1: 3 red and 2 yellow marbles, in total 5 marbles.

The probability to select red marble is $\dfrac{3}{5}=0.6.$

Urn U2: 3 red and 7 yellow marbles, in total 10 marbles.

The probability to select red marble is $\dfrac{3}{10}=0.3.$

Urn U1: 1 red and 4 yellow marbles, in total 5 marbles.

The probability to select red marble is $\dfrac{1}{5}=0.2.$

The probability to choose each urn is the same and is equal to $\frac{1}{3}.$

Thus, the probability that the marble is red is

$\dfrac{1}{3}\cdot 0.6+\dfrac{1}{3}\cdot 0.3+\dfrac{1}{3}\cdot 0.2=\dfrac{1.1}{3}=\dfrac{11}{30}.$

4 0

2 years ago

Answer all 4 please

FrozenT [24]

1)
$180 - (37 + 90) = 180 - 127 \\ = 53$
2)
$(180 - 15) \div 2 = 165 \div 2 \\ = 82.5$
each of other angles measures 82.5 degrees

3)
$180 - (42 + 20) = 180 - 62 \\ = 118$
4)sorry I don't know the last one

7 0

3 years ago

A prism with a triangular base has a volume of 432 cubic feet. The height of the prism is 8

Rashid [163]

Answer:

9 feet

Step-by-step explanation:

Given:

A prism with a triangular base has a volume of 432 cubic feet.

The height of the prism is 8.

The triangle base has a base of 12 feet.

Question asked:

The height of the triangular base of the prism = ?

solution:

Volume of triangular prism = $Area of triangle \times height$

$432 = Area of triangle \times8$

Dividing both side by 8

$54 = Area of triangle$

$54 =$ $\frac{1}{2} \times base \times height$

$54 = \frac{1}{2} \times12\times height\\54 = \frac{12}{2} \times height$

Multiplying both side by 2

$108 = 12 \times height$

Dividing both side by 12

$9 = height$

Thus, height of the triangular base of the prism is 9

3 0

2 years ago

Please help me this is 7th grade ratios

AfilCa [17]

15 is the answer hope this helps

6 0

2 years ago

3 adult tickets and 1 child ticket to a play cost $38. 3 adult and 3 children tickets cost $52. what does each ticket cost?

babymother [125]

A= adult
C= child

3A+C = 38.3
A+3C = 52

There is no logical way to find the value of each other than guess-and-check.

5 0

3 years ago