MATHEMATICS MIDDLE SCHOOL

Does the equation represent a direct variation? If so, find the constant of variation.4x -5y = 0

a. yes; k = -5 b. no c. yes; k = 4/5 d. yes; k = - 4

Answers

Answer 1
Answer:

Answer:

4/5

Step-by-step explanation:

4x-5y=0  

subtract 4x on both the sides  

4x-4x-5y = 0-4x  

-5y = -4x

divide by -5 on both the sides  

-5y/-5 = -4x/-5

y =( 4/5 )x  

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What is the surface area of this prism? A. 120 cm2 B. 122 cm2 C. 240 cm2 D. 184 cm2

Answers

Here is how to get the Surface Area of a triangular prism.
First you must find their areas first then multiply it by 2 (because it has 2 faces) except for the base, since it has a triangular base.
A = bxh/2                           A = 15 m x 30 m         A = 30 m x 18 m
   = (18 m x 12 m )/2             =  450 m^2                  = 540 m^2 
   = 216 m ^2/2
   = 108 m^2
Add all the faces:
SA = 2 (108 m^2) + 2 (540 m^2 ) +  450 m^2     
     = 216 m^2 +1080 m^2 + 450 m^2  
     = 1,746 m^2
The answer is not found in your choices. The attached picture is also showing m (meter) as the unit used not cm.....so I guess you got the wrong choices.

Jamel watched his older brother Robert lift weights. The bar alone had a mass of 20 kg. On the bar he had tow 11.4 kg weights, two 4.5 kg weights , and four 450 g weights. What mass was Robert lifting ?

Answers

all you do is add them all together...
20 + 11.4 + 11.4 + 4.5 + 4.5 + 0.45 + 0.45 + 0.45 + 0.45 = 53.6Kg
(note that 0.45 is 450g in Kg, When adding things such as weight or length you want to make sure that they are all in the same unit)

PLEASEEE HURRY!!Evaluate the expression 3c (−2) d (−4) for c = 3 and d = 4. the number in parenthesis are exponents.

Answers

Answer:

288

Step-by-step explanation:

In the given expression, we can replace the given values for c and d

Since c is 3 and d is 4,

3c(-2)d(-4)

After substituting we multiply:

= 3*3*-2*-4*4

= (9)(-2*-4)*4

Two minuses become positive

So it'll be,

9*8*4

= 288

Here's ur answer

Tom has 7/8 cup of olive oil. He uses 1/2 cup to make salad dressing and 1/4 cup to make tomato sauce. How much olive oil does Tom have left?

Answers

Half of eight equals 4, so Tom will lose 4/8 to the salad dressing. one fourth of eight would be 2/8. So 2/8 + 4/8 = 6/8. Now 6/8 subtracted from 7/8 = your answer, 1/8!

Hope this helps! : )
Using our common denominators, we can convert 1/2 to 4/8, and 1/4 to 2/8. As 2+4 = 6, we can subtract our used olive oil (6/8) from our total (7/8), leaving us with 1/8 a cup olive oil.

What’s the answer ????

Answers

Answer:

C. The graph would shift five units to the left.  

Step-by-step explanation:

y = x² + 5x - 2

We can write this equation in the form

y = a(x - h)² + k

If you change the value of h, you are translating the parabola horizontally.

If you increase h by five units, the graph shifts five units to the left.

In the figure below, the red parabola represents the original equation.

The blue parabola shows the graph shifting five units to the left

(from x = -2.5 to x = -7.5) when you replace x by x + 5.

Answer:

C. The graph would shift 5 units to the left

Step-by-step explanation:

If (x+5) was substituted in the place of x then it would shift 5 units to the left

Answer is C.

Please help me with math, worth 10 points! :D

Answers

Distribute:5x+20-4x=18-23simplify:1x+20=-5subtract 20:1x=-25Answer x=-25
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