Can someone help me please... Thanks!

Answers

Answer 1

Answer:
It's A, according to my math teacher, she says ?/2 is usually a half. The answer A says "he lost HALF of his cards", then, with the minus 1, it sais "then he lost one of his cards" and he was left with 24 cards :) Comment if this is incorrect

Answer 2

Answer: a is the correct answer i believe.

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seth and Brian ran the 200 yard dash at the track meet. Brian reached the finish line in 30 seconds. Seth ran 25 feet per second. who finished the race first? explain your reasoning.

Answers

ok so we know that brian took 30 seconds to finish the race, but we don't know how long seth took. The problem told us the race was 200 yards and that seth ran 25 feet per second. From those two pieces of information, we can figure out how many seconds it took seth to run 200 yards. Since the problem told us he ran 25 FEET per second, we will convert the length of the track from yards to feet. There are 3 feet in a yard, so the track is 600 feet. Since he ran 25 feet per second, if we divide the length of the track by the speed he ran, we will get how long it took him to run. So 600 divided by 25 will give us 24 seconds. So Brian ran the race in 30 seconds and Seth ran it in 24, so Seth ran the race the fastest!

You are a volunteer at a physical therapy clinic. a set of stairs you use to help patients is shown with it's dimensions. What is the volume of the set of stairs?

Answers

The volume of the rectangular set of stairs is V = 12,960 inches³

What is the Volume of a Rectangle?

The volume of the rectangle is given by the product of the length of the rectangle and the width of the rectangle and the height of the rectangle

Volume of Rectangle = Length x Width x Height

Volume of Rectangle = Area of Rectangle x Height

Given data ,

Let the total volume of the rectangular set of stairs be represented as V

Now , the value of V is

Let the volume of the first stair be A

The length of stair A = 30 inches

The width of A = 12 inches

The height of A = 4 inches

Volume of Rectangle = Length x Width x Height

So , the volume of stair A = 30 x 12 x 4 = 1,440 inches³

Let the volume of the second stair be B

The length of stair B = 30 inches

The width of B = 36 inches

The height of B = 4 inches

Volume of Rectangle = Length x Width x Height

So , the volume of stair B = 30 x 36 x 4 = 4,320 inches³

Let the volume of the third stair be C

The length of stair B = 30 inches

The width of B = 60 inches

The height of B = 4 inches

Volume of Rectangle = Length x Width x Height

So , the volume of stair C = 30 x 60 x 4 = 7,200 inches³

Now , the total volume of stairs V = A + B + C

On simplifying , we get

The total volume of rectangular stairs V = 1,440 + 4,320 + 7,200 inches³

The total volume of rectangular stairs V = 12,960 inches³

Hence , the volume of rectangular stairs is 12,960 inches³

To learn more about volume of rectangle click :

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The volume formula is area of base×height. In this case, we are working with rectangles, so the formula is l×w×h. We have to find the volume of each block and add them together. Top rectangle: 12×30×4=1440. Middle rectangle: 30×36×4=4320. Bottom rectangle: 30×60×4=7200. 7200+4320+1440=12960 inches squared.

Dmitri wants to cover the top and sides of the box shown with glass tiles that are 3 5 mm square How many tiles does he need 20 cm 15 cm

Answers

lets split the box in pieces and then add:
top = 20*15 = 300
sidesA = 2*20*9 = 360, is multiplied by 2 cause there are 2 sides like this
sidesB = 2*9*15 = 270, is multiplied by 2 cause there are 2 sides like this
so in total we have:
total = 300 + 360 + 270 = 930 cm^2
if we express this quantity in mm^2 we have:
1cm² = 100 mm²total = 930*100 = 93000 mm^2
so if the tiles are 5 mm^2 we need:
total tiles = 93000/5 = 18600
we need 18600 tiles of 5 mm^2

Explain how to use proportional reasoning to find 35 percent of 600

Answers

You can divide 35 by 100 then multiply by 600

You can divide 35 into 600

How many solutions does this linear system have? Y=-6x+2 and -12x-2y=-4

Answers

We can solve the system of equations to check the number of system of the solutions.

y=-6x+2 ...(1)

-12x-2y=-4 ...(2)

Substitute -6x+2 for y in equation (2). So,

-12x-2(-6x+2)=-4

-12x+12x-4=-4 (By distribution property).

-4=-4 (-12x and +12x has been cancel out).

Notice x has vanish from the above equation and we are left with -4=-4 which is correct.

So, the system has infinte number of solutions.

Answer:

D: Infinite number of solutions

Step-by-step explanation:

I got it right on Edge

What is the correct sums 7 hundredths + 7 tenths ，7 tenths + 70 hundredths
，1 tenth + 17 hundredths
，10 tenths + 4 hundredths
，11 hundredths + 8 tenths

，Options 177\100 91\100 140\100 77\100 27\100 104\100

Answers

$a) (7)/(100) + (7)/(10) = (7)/(100) + (7*10)/(10*10) = (7+70)/(100) = (77)/(100) \n \n b) (7)/(10) + (70)/(100) = (7*10)/(10*10)+ (70)/(100)= (70+70)/(100)= (140)/(100) \n \n c)(1)/(10) + (17)/(100) = (1*10)/(10*10) + (17)/(100)= (10+17)/(100) = (27)/(100) \n \n d) (1)/(1) + (4)/(00) =(1*100)/(1*100) + (4)/(100) = (100)/(100) + (4)/(100) = (104)/(100) \n \n$

$e) (11)/(100)+ (8)/(10) = (11)/(100)+(8*10)/(10*10) =(11+80)/(100) = (91)/(100)$

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