All categories

3 years ago

x is directly proportional to y. When y = 7, x = 28. Write and equation of x in terms of y. Find x when y = 15.

2 answers:

6 0

X = ky— directly proportional

28 = 7k

4 = k

so x = 4y

plug in y and you get x = 4(15) = 60

Therefore, x = 60 when y = 15

jenyasd209 [6]3 years ago

5 0

Answer:

Step-by-step explanation:

28 : 7 : : x : 15

28 / 7 = x / 15

4 = x / 15

x = 4 * 15

x = 60

You might be interested in

The graph of an exponential function has a negative y-intercept and a common ratio (T) such that 0 << 1. which statements

andrew-mc [135]

Step-by-step explanation:

tell me when you get the answer

7 0

3 years ago

Adam is 159 centimeters tall and casts a shadow 105 centimeters in height. If Cara is 140 centimeters tall, how many centimeters

vodomira [7]

Answer:

The answer to your question is 12.55 cm

Step-by-step explanation:

Data

Adam Cara

height = 159 cm height = 140 cm

shadow = 105 cm shadow = x

Process

1.- To solve this problem use the Thales' theorem

Cara's shadow / Cara's height = Adam's shadow / Adam's height

- Substitution

x / 140 = 105 / 159

-Solve for x

x = 105 (140) / 159

-Simplification

x = 14700 / 159

x = 92.45 cm

Cara's shadow is 92.45 cm long.

2.- If both shadows are in line, then Cara must walk forward

105 - 92.45 cm

12.55 cm

4 0

3 years ago

You bought 15 apples and 2 bags of Carmel for $16.00. The bags of caramel costs $5.35. How much does each apple cost? Write an e

OLga [1]

Answer:

5.35*2+x=16 and the answer is $.35

Step-by-step explanation:

5.35*2+x=16

10.70+x=16

-10.70 -10.70

x=5.30

5.30/15= about .35

6 0

3 years ago

Read 2 more answers

Which relation is a function? (10 points and Brainliest for a correct answer)

Volgvan

B I’m pretty sure okay bye

7 0

3 years ago

Turner measured the floor of his storage unit, which is rectangular. It is 48 feet wide and 52 feet from one corner to the oppos

saveliy_v [14]

Answer:

<u>The storage unit is 20 feet long.</u>

Step-by-step explanation:

1. Let's use the Pythagorean Theorem to find the unknown side or length of the storage unit:

With the information given, we have a right triangle with 52 feet of hypotenuse and 48 feet as one of its sides and width of the storage unit.

Length of the storage unit ² = Hypotenuse ² - Width of the storage unit ²

Replacing with the real values:

Length of the storage unit ² = 52² - 48²

Length of the storage unit ² = 2,704 - 2,304

Length of the storage unit ² = 400

√Length of the storage unit ² = √400

<u>Length of the storage unit = 20 feet</u>

4 0

3 years ago