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olya-2409 [2.1K]
3 years ago
13

I will give brainliest answer to these questions

Mathematics
1 answer:
cupoosta [38]3 years ago
5 0

Answer:

THATS MADDDD CAPPPP U NEED 25 POINTS OF THE QUESTION FOR BRAINLIEST

You might be interested in
Please help me, i will give brainliest!! help me please
Minchanka [31]

The answers are :

10) 25 : 24

11) 24 : 5

12) 36 : 5

13) 7 : 3

14) 15 : 1

<u>Ratio = Number of event 1 : Number of event 2</u> (in same unit, if necessary)

<u>10</u>

Girls preferring orange juice : Boys preferring orange juice

50 : 48 (Divide by 2 on both sides)

25 : 24

<u>11</u>

Boys preferring orange juice : Boys preferring grapefruit juice

48 : 10 (Divide by 2 on both sides)

24 : 5

Remember :

  • <u>1 minute = 60 seconds</u>
  • <u>1 week = 7 days</u>
  • <u>1 hour = 60 minutes</u>

<u />

<u>12</u>

3 minutes : 25 seconds

3 × 60 : 25 (Divide by 5 on both sides)

3 × 12 : 5

36 : 5

<u>13</u>

2 weeks : 6 days

2 × 7 : 6 (Divide by 2 on both sides)

7 : 3

<u>14</u>

5 hours : 20 minutes

5 × 60 : 20 (Divide by 20 on both sides)

5 × 3 : 1

15 : 1

4 0
2 years ago
Downloading music costs $0.99 per song, plus a registration fee of $25. Which expression represents the total cost to download x
s2008m [1.1K]

$25.99x

Step-by-step explanation:

As, for 1 song = $0.99 + $25

So, 1 song = $25.99

So, x song = $25.99 multiplied by x

Which is = $25.99x

So answer = $25.99x

7 0
3 years ago
Find the median of the data. <br><br> 35, 29, 21, 49, 13, 38, 40
olga55 [171]

Answer:

to sum it up put all of the numbers ers in order and it is the middle number

6 0
3 years ago
Read 2 more answers
In tennis, a first serve can be an ace, a fault, or it can be returned. In one match, a tennis player hit 24 aces, which was 25
Anastaziya [24]

Answer:

16 faults

Step-by-step explanation:

<u><em>The correct question is</em></u>

In tennis, a first serve can be an ace, a fault, or it can be returned. In one match, a tennis player hit 24 aces, which was 2/5 of all her first serves. If 1/3 of her first serves were returned, how many of the tennis player's first serves were faults?

Let

x -----> the number of all her first servers

y ----> the number of first services returned

z ---> the number of first services faults

we know that

The number of aces plus the number of returned plus the number of faults must be equal to the number of all her first services

so

x=24+y+z

step 1

Find out the number of all her first servers

we have that

24=\frac{2}{5}x

Solve for x

x=24(5)/2\\x=60\ first\ services

step 2

Find out the number of first services returned

y=\frac{1}{3}x

substitute the value of x

y=\frac{1}{3}(60)=20\ returned

step 3

Find out the number of first services faults

x=24+y+z

we have

x=60\\y=20

substitute and solve for z

60=24+20+z

60=44+z

z=16\ faults

6 0
3 years ago
One leg of a right triangle is more than 3 more inches than the shorter leg. The hypotenuse is 15 inches. What are the lengths o
Deffense [45]

Answer:

1. 9 inches, 12 inches and 15 inches

2. 54 square inches

Step-by-step explanation:

1. The first part of this question would lead to a quadratic equation. Let the shorter leg be represented by x.

shorter leg = x

other leg = x + 3

hypotenuse = 15 inches

Applying the Pythagoras theorem, we have;

/15/^{2} = /x/^{2} + /x+3/^{2}

225 = x^{2} + (x+3)^{2}

225 = x^{2} + x^{2} + 6x + 9

       = 2x^{2} + 6x + 9

2x^{2} + 6x + 9 - 225 = 0

2x^{2} + 6x - 216 = 0

divide through by 2 to have

x^{2} + 3x - 108 = 0

From the quadratic formula;

x = (-b ± \sqrt{b^{2}-4ac } ) ÷ 2a

but, a = 1, b = 3, c = -108

x = (-3 ± \sqrt{(3)^{2}-4(1)(-108)}) ÷ 2

  = (-3 ± \sqrt{441}) ÷ 2

= (-3 ± 21) ÷ 2

Thus,

x = (-3 + 21) ÷ 2 OR x = (-3 - 21) ÷ 2

x = 9 OR x = -12

So that, x = 9 inches

The shorter leg is 9 inches, and the other leg is 12 inches.

2. The area of the triangle can be determined by applying Heron's formula:

A = \sqrt{s(s-a)(s-b)(s-c)}

where s is the average value of the sum of the three sides a, b, and c.

Let, a = 9, b = 12 and c = 15

s = \frac{a +b+c}{2}

  = \frac{(9+12+15}{2}

  = 18

A = \sqrt{18(18-9)(18-12)(18-15)}

   = \sqrt{18*9*6*3}

   = \sqrt{2916}

A = 54

Area of the triangle is 54 square inches.

4 0
3 years ago
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