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Mademuasel [1]
3 years ago
12

13x - 5y (if x = 10 and y = 6)​

Mathematics
2 answers:
Troyanec [42]3 years ago
5 0
The answer would be 130x-30y
OlgaM077 [116]3 years ago
3 0

Answer:

13(10) - 5 (6)

130 - 30

= 100

Step-by-step explanation:

You replace the x with 10, and the y with 60 and answer normally

13(30) = 130

5(6) = 30

130 - 30 = 100

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Andreas93 [3]
I believe the answer to that question is -20
3 0
3 years ago
Diana had a large stack of playing cards. She knew that 17 of them were kings. She took a sample of 30 cards and found 4 kings.
Mandarinka [93]

Answer:

Diana approximately had 128 cards

Step-by-step explanation:

Let n  be the number of cards Diana had. She knows that

  • there are 17 kings among n cards
  • 4 kings among 30 cards

Write a proportion:

\dfrac{17}{n}=\dfrac{4}{30}

Cross multiply:

4n=17\cdot 30\\ \\4n=510\\ \\n=\dfrac{510}{4}=127.5\approx 128

5 0
3 years ago
Find missing side of triangle, help!
dezoksy [38]

Answer:

2√10 km

Step-by-step explanation:

By Pythagoras theorem,

x^2 + 9^2 = 11^2

x^2 + 81 = 121

x^2 = 121 - 81

x^2 = 40

= 4 x 10

x^2 = 2^2 x 10

x = 2√10 km

5 0
3 years ago
Svetlana hair is 4 centimeters long. Her hair grows 1.5 cm per month. Svetlana wants her hair to grow so at least 7 cm long. Wri
Andrei [34K]

Let "per month" = m

The inequality is

1.5m + 4 ≥ 7

+ 4: Her hair right now is 4 cm long

1.5m: Her hair grows 1.5 per month (m)

≥ 7: She wants it to be at least 7 or more.

1.5m + 4 ≥ 7 is your answer

hope this helps

3 0
3 years ago
How do you get from -16x^3 to -x?
Maru [420]

Answer:

(−x)(16x2+1)

Step-by-step explanation:

−16x3−x

−16x3−x

=(−x)(16x2+1)

-16

7 0
3 years ago
Read 2 more answers
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