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Papessa [141]
3 years ago
9

Y varies directly as x if x=15 when y=20, find x when y=30

Mathematics
1 answer:
mixas84 [53]3 years ago
6 0

Answer:

X=22.5

Step-by-step explanation:

Y=kX

20=15k

k=4/3

For X when Y=30

30=4/3×X

Cross multiply

4X=90

X=22.5

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jonny [76]
The perimeter of the shape is 30 add all the sides
3 0
3 years ago
Simplify the following 6(1/2+1/3)​
gogolik [260]

Answer:

5

Step-by-step explanation:

use the distributive property

6 * 1/2 = 3

6 * 1/3 = 2

3 + 2 = 5

<em><u>Hope this helped! Have a nice rest of ur day! Plz mark as brainliest!!!</u></em>

<em><u>-Lil G</u></em>

8 0
3 years ago
Find the value of the combination.<br><br> 21 C 3<br><br> 7,980<br> 2,660<br> 1,330
erik [133]
To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330
4 0
3 years ago
Solve the equation.
mylen [45]

-9/15y+3/21=5/15y-14/21

Move 5/15y to the other side. Sign changes from +5/15y to -5/15y

-9/15y-5/15y+3/21=5/15y-5/15y-14/21

-14/15y+3/21=-14/21

Move 3/21 to the other side. Sign changes from +3/21 to -3/21.

-14/15y+3/21-3/21=-14/21-3/21

-14/15y=-14/21-3/21

-14/21-3/21=-17/21

-14/15y=-17/21

Multiply both sides by -15/14

-14/15y(-15/14)

Cross out 15 and 15, divide by 15 then becomes 1

Cross out 14 and 14, divide by 14 then becomes 1

1*1*y=y

-17/21*-15/14

Cross out 15 and 21 , divide by 3. 15/3=2, 21/3=7

17/7*5/14=85/98

Answer: c. y=85/98

7 0
3 years ago
Identify the corresponding word problem given the equation: x = 10 × 200 A) Frank and ten workers are hired to harvest tomatoes
KengaRu [80]
The original equation is x=10×200
Frank and the # of workers hired= # of workers+Frank
x= the total area of the field, not how much each worker has to harvest
10×20=200
9+1=10
10×200=x
Solution: B. Frank and nine workers are hired to harvest tomatoes from a field. If each of the workers is given a plot which is 10 by 20 feet in size,what is the total area of the field?
7 0
3 years ago
Read 2 more answers
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