All categories

3 years ago

The value of y varies directly with x, when y = 36, and x = 9. What is the equation for the relationship?

Mathematics

2 answers:

trapecia [35]3 years ago

8 0

Answer:

4x = y

Step-by-step explanation:

If y is 36 and x is 9, you know 9 x 4 = 36. So it would be 4x = y

Fynjy0 [20]3 years ago

4 0

4x=y I know because I did this just trust me

You might be interested in

The triangles are similar

hoa [83]

Answer:

Part 1) $x=16\ units$

Part 2) $x=23\ units$

Part 3) $AE=20\ units$

Part 4) $x= 6.25\ units$

Part 5) $x=26.67\ in$

Step-by-step explanation:

Part 1) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{12}{3}=\frac{x}{4}\\\\3x=12*4\\ \\x=48/3\\ \\x=16\ units$

Part 2) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{36}{12}=\frac{39}{(x-10)}\\\\3(x-10)=39\\ \\x=(39/3)+10\\ \\x=23\ units$

Part 3) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{AB}{CD}=\frac{AE}{ED}$

substitute the values

$\frac{10}{4}=\frac{2x+10}{x+3}$

$2.5(x+3)=2x+10$

$2.5x+7.5=2x+10$

$2.5x-2x=10-7.5$

$0.5x=2.5$

$x=5\ units$

$AE=2x+10=2*5+10=20\ units$

Part 4) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{4}{5}=\frac{5}{x}\\ \\4x=5*5\\ \\ x=25/4\\ \\ x= 6.25\ units$

Part 5) we know that

If two triangles are similar

then

the ratio of their corresponding sides are equal

In this problem

$\frac{30}{x}=\frac{45}{40}\\ \\45x=30*40\\ \\x=1,200/45\\ \\ x=26.67\ in$

3 0

3 years ago

Read 2 more answers

Match the verbal description to the correct expression.

dusya [7]

Answer:

1. n + 34

2. n - 34

3. n × 34

Step-by-step explanation:

1. 34 more than a number n + 34

2. a number decreased by 34 n - 34

3. the product of a number and 34 n × 34

6 0

3 years ago

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per

Hitman42 [59]

plane 1 travels 395 miles in 1 hour

plane 2 travels 422 miles in 1 hour

together, they travel (395+422) 817 miles in 1 hour

to have 2451 miles between then, they'd need to travel

$\frac{2451 miles}{817 miles}=3$

so in 3 hours, they'll be 2451 miles apart

3 0

3 years ago

Given that<br> a = 2,5= 2 and C = -1<br> work out<br> 2b – 3ac

poizon [28]

Step-by-step explanation:

2b-3ac

=2×2-3×2×(-1)

= 4+6

=10

6 0

3 years ago

A phone company charges a flat rate of $15 to make phone calls for a month.they charge $0.10 per minute for each call made.if th

Ne4ueva [31]

Answer:

450 minutes

Step-by-step explanation:

15 + 0.1x = 60

15 - 15 + 0.1x = 60 - 15

0.1x = 45

$\frac{0.1x}{0.1} = \frac{45}{0.1}$

x = 450

5 0

3 years ago

Read 2 more answers