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alukav5142 [94]
3 years ago
15

The variable x and y are directly proportional and y=2 when x=3. what is the value of y when x=9?

Mathematics
1 answer:
natta225 [31]3 years ago
5 0
Y = kx is the direct variation equation, where k is the constant of variation.
Find k.

2 = k * 3
2/3 = k

Write the variation equation.
y = (2/3)x

Plug in new value.
y = (2/3)* 9
y = 6
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Polygon B BB is a scaled copy of Polygon A AA using a scale factor of 5 55. How many times larger is the area of Polygon B BB th
stira [4]

Answer:

308025 times larger

Step-by-step explanation:

The polygon BBB is a scaled copy of polygon A using a scale factor of 555.

This means for every length of polygon AAA, polygon BBB is 555 times larger.

Recall area is in L^{2}.

Area of polygon BBB = (scale factor)^2 multiplied by area of polygon AAA

Since the scale factor is 5

Area of polygon BBB = (555^2) * Area of polygon AAA

Area of polygon BBB = 308025 times the area of polygon AAA

Hope I have been able to help.

8 0
3 years ago
Read 2 more answers
Michael paid $16.40 for 20.5 centimeters of wire. Find the unit price in dollars per centimeter. If necessary round your answer
Korvikt [17]

Answer:

$0.80

Step-by-step explanation:

$16.40 ÷ 20.5 = 0.80

You can check your work by doing :

20.5 cm of wire × $0.80 = $16.40

4 0
3 years ago
Integers <,>,or =between the pair of number |-13| |19| to make a true statement
kvasek [131]
Because the /-13/ should be positive so /-13/>/19/
3 0
3 years ago
-2x - y = -9<br><br>5x -2y = 18<br>Solve as a whole number
nexus9112 [7]

Answer:

x = 4, y = 1

(4, 1)

Step-by-step explanation:

-2x - y = -9

5x -2y = 18

-2x - y = -9

+2x     +2x

-y = 2x - 9

/-1    /-1

y = -2x + 9

5x -2y = 18

5x - 2(-2x + 9) = 18

5x + 4x - 18 = 18

9x - 18 = 18

    + 18   + 18

9x = 36

/9  /9

x = 4

Now, we solve for y:

-2(4) - y = -9

-8 - y = -9

+ 8     +8

-y = -1

/-1  /-1

y = 1

(x, y) -> (4, 1)

Hope this helps!

6 0
3 years ago
Triangle RST has sides measuring 22 inches and 13 inches and a perimeter of 50 inches. What is the area of triangle RST? Round t
VladimirAG [237]

Using the Heron's formula, the area of the triangle is: D. 95 square inches.

<h3>What is the Heron's Formula?</h3>

Area = √[s(s - a)(s - b)(s - c)] where s is half the perimeter, or (a + b + c)/2.

Given the following:

s = semi-perimeter = 1/2(50) = 25 in.

a = length of side a = 22 in.

b = length of side b = 13 in.

c = length of side c = 50 - 22 - 13 = 15 in.

Plug in the values

Area = √[25(25 - 22)(25 - 13)(25 - 15)]

Area = √[25(3)(12)(10)]

Area ≈ 95 square inches.

Learn more about the Heron's formula on:

brainly.com/question/10713495

#SPJ1

5 0
2 years ago
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