MATHEMATICS HIGH SCHOOL

Ito washes 7 cars in 3 hours. Joanwashes 9 cars in 4 hours. Who
washes cars at a faster rate?

Answers

Answer 1
Answer:

Answer:

Ito

Step-by-step explanation:

Make them to their closest common multiple which is twelve.

Next times 7 by 4 as 3*(4) is 12

Then time 9 by 3 as 3*(4) is 12

7*4=28

9*3=27

Therefore ito washes at a faster rate
Answer 2
Answer:

Answer:

ITO

Step-by-step explanation:

ITO

He can wash 7 cars in 3 hours.

a) 3 x 60 min = 180 minutes

b) 180\7 = 25.71 minutes per car

JOAN

She can wash 9 cars in 4 hours

a) 4 x 60 = 240 minutes

b) 240\9 = 26.66 minutes per car

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a bottle rocket that was made in science class has a trajectory path that followed the quadratic equation y equals negative x squared + 4x + 6 what is the turning point of the Rockets

Answers

y= -x^(2)+4x+6

Turning points occur when the gradient of the function is zero.
(dy)/(dx) =-2x+4
Then equating to 0;
-2x+4=0
-2x=-4
x=2

From the fucntion, when x=2 ;
y=-(2)^(2)+4(2) +6
y=-8+8+6
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Turning point;
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Which equation to solve the problemIt takes Zane m minutes to clean his room.  This is 35 minutes more that the 22 minutes it takes to walk the dog.  How long does it take to clean his room?

A. m-35=22
B. m+22=35
C. 35-m=22
D. m+35=22

Answers

The equation labeled ' A ' will lead you to the correct value of ' m ' .
I think the answer is A because 35 mins more that the 22 mins it takes to walk the dog so have to be 22+35

Delia can buy 3 sweatshirts for a total of $39. How much would it cost if she were to buy 7 sweatshirts?​

Answers

Answer:

7 sweatshirts costs $91

Step-by-step explanation:

Well, first we have to find how much each sweatshirt costs alone. The sweatshirts are $13 each. So, if we multiply 13 by 7, you'll get the amount that 7 sweatshirts costs.

I'm 97% sure this is correct

Hope this helped! Please mark brainliest!

What is half of a quarter of 400?

Answers


A quarter is 100 and half of that is 50
so what is 1/2 times 1/4 times 400 or
what is 1/8 of 400
the answer is 50

Multiply. (−2.1) ⋅ (−1.4) Responses −29.4 negative 29.4 −2.94 negative 2.94 2.94 2.94 29.4

Answers