I need an answer as soon as possible

Answer:

k = 24, y = 24x

Step-by-step explanation:

Given x and y are proportional then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition when y = 72, x = 3 , then

72 = 3k ( divide both sides by 3 )

k = 24

y = 24x ← equation of proportion

Answer:

164

Step-by-step explanation:

443-279

=164

Answer:

443 - 279 = 164

Step-by-step explanation:

so train A should be 279 pounds

and train B should be 164 pounds

So sorry i might be wrong i tried my best

Answer:

y = 16.84

Step-by-step explanation:

y - 7.74 = 9.1

=> y = 9.1 + 7.74

=> y = 16.84

Answer:

a= 50 c=20  50+20=70 450+100

Step-by-step explanation:

good luck on tes t man

Answer:

739.8 ft

Step-by-step explanation:

Answer:

m = 3+y/y-4

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Answer:

76

Step-by-step explanation:

khan x math

Answer:

B. 240mi.

Step-by-step explanation:

Answer:

D. 340

Step-by-step explanation:

Proof: I put all the constants together to equal 340.

(not much proof but believe me)

Answer:

60%

Step-by-step explanation: 24/40 equals .6. Multiply .6 by 100 to get your percentage, which equals 60%. hope this helps

Answer:

0.063

is the correct answer

Answer:

0.063

Step-by-step explanation:

Answer:

the

Step-by-step explanation:

Answer:

80

Step-by-step explanation:

25%X4=100%

20X4=80

Answer:

270 seconds

Step-by-step explanation:

Melissa's time = x seconds

Abby's time = (x + 30) seconds

Abby walks at a speed of 8 feet per second, and Melissa walks at a speed of 9 feet per seconds.

But, speed = [tex]\frac{distance}{time taken}[/tex]

For Abby,

8 = [tex]\frac{distance}{(x + 30)}[/tex]

distance = 8(x + 30) ................. 1

for Melissa,

9 = [tex]\frac{distance}{x}[/tex]

distance = 9x ............. 2

From equations 1 and 2, for the same distance;

8(x + 30) = 9x

8x + 240 = 9x

x = 240 seconds

Abby's time = (x + 30)

                    = (240 + 30)

                    = 270 seconds

So that Abby has been walking for 270 seconds when both students had walked exactly the same distance.

The time taken is 270 seconds.

Given that,

Based on the above information, the calculation is as follows:

8(x + 30) = 9x

8x + 240 = 9x

x = 240

So Abby time should be

= 240 +  30

= 270

Learn more: brainly.com/question/17429689

Answer:

x=1, y=4

Step-by-step explanation:

x+y=5 - (1)

y=3x + 1 (2)

Sub (2) into (1)

x + (3x +1)=5

4x=5-1

x=4 ÷4

=1

Sub x=1 into (2)

y=3(1)+1

= 4

Hope it helps

Have a good day

Answer:

$50

Step-by-step explanation:

1. First you need to divide 70 by 7.

2. Your answer should be 10.

3. You then need to multiply the product, 10 by 5.

4. You answer should be 50 and because we are using this in a money situation the answer is $50.

Answer:

50

Step-by-step explanation:

Step-by-step explanation:

invert the second fraction and multiply

-5/7 * -3/1 = 15/7 = 2 1/7

Answer:

84

Step-by-step explanation:

To complete the concrete highway with pavers 84 pavers are needed.

We know the perimeter of any 2D figure is the sum of the lengths of all the sides except the circle and the area of a rectangle is the product of its length and width.

From the given information each Pavel has an area of 4.5 square feet.

And the area of the driveway can be obtained by multiplying the length and width of the driveway which is,

= (21×18) sq feet.

= 378 sq feet.

Therefore, The number of pavers needed is,

= (378/4.5).

= 84 pavers.

learn more about rectangles here :

https://brainly.com/question/29123947

#SPJ3

Answer:

Step-by-step explanation:

(x+9)² + (y-6)² = 9²

Answer:

length =25m

breadth =16m

area of rectangle =25*16

according to question

area of rectangle =Area of Square

Area of squre =400m

Side *Side =400m

(Side)=(20m)

Side =20m

Answer:

12-8+3 for the numerical and 2x=3y-6 for the algebraic expression

Step-by-step explanation

Numerical expression consists of numbers and one operation

Algebraic expression consist of multiple varaibles  and constents

Answer:

algebraic expression: 6p +18

Answer:

C

Step-by-step explanation:

Answer:

its   a hehehehehehhehehe\

Step-by-step explanation:

Answer:

No

Step-by-step explanation:

The slopes of the equations are unequal, meaning the lines are not parallel and will eventually intercept

Answer:

(b) 217 cm

Step-by-step explanation:

The computation of the number of centimeters will each have is shown below:

= Length of the string ÷ number of pieces

= 10.85 meters ÷ 5

= 2.17 meters

= 217 centimeters

hence, the correct option is b.

Answer:

You can figure out prime numbers by simply knowing that you can divide that number not more than one. For example, you could know that a prime number is 7 because you can only divide it once like 7 divided by 1. While for number 14, you can divide it twice which isn't a prime number because there is 14 divided by 2 and 14 divided by 1 which is more than one to divide. That's possibly an easy way to understand how to figure them out.

Answer:

A

Step-by-step explanation:

The reflected rays come from a point on the reflective surface. That point is where the lines meet is the vertex.

Answer:

(half of base)² + (height)² = (20)²

Step-by-step explanation:

In an isosceles triangle, the angle bisector from the 3rd angle to the opposite side is a perpendicular bisector, so you split the isosceles triangle into two congruent right triangles.

This technique of 'splitting the isosceles' is used a LOT.

9514 1404 393

Answer:

  √65 ≈ 8.06

Step-by-step explanation:

The distance formula is used for the purpose.

  d = √((x2 -x1)² +(y2 -y1)²)

  d = √((2 -(-5))² +(0 -4)²) = √(7² +(-4)²) = √(49 +16)

  d = √65 ≈ 8.0622577

The distance between C and Q is √65, about 8.06 units.

Answer:

1300y^2+1400y+343

Step-by-step explanation:

Use FOIL to cancel out the products