Help me please i will help you too

Answers

Answer 1

Answer: Day 3 is A because it tell how many pieces of candies eaten in a minute.
Day 4 is 10 and 15 because the ratios go in a pattern by 5
Day 5 is D but I really dont know that one

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A microscope is set so it makes an object appear 4 x 10`2 times larger than its actual size. A virus has a diameter of of 2 x 10`-7 meter. how large will the diameter of the virus appear when it is viewed under the microscope.

Answers

$2\cdot10^(-7)\ meter\ \rightarrow\ \ the\ actual\ size\n\nscale=4\cdot10^2\n\nthe\ size\ under\ the \ microscope\ \n\n=4\cdot10^2\cdot2\cdot10^(-7)\ meter=8\cdot10^(-5)\ meter\n\nAns.\ the\ size\ under\ the \ microscope\ is\ 8\cdot10^(-5)\ meter.$

Is 8/10 equivalent to 4/5

Answers

yes 8/10 is equivalent to 4/5 or 16/20 ...

Yes it is equivalent

Solve for y.
50/90-y=5/18

Answers

Answer:

y = 5/18

Step-by-step explanation:

50/90-y=5/18

Lets simplify our fractions

50/90 = 5/9 (divide top and bottom by 10)

5/9 - y = 5/18

Subtract 5/9 from each side

5/9 -5/9 -y = 5/18 - 5/9

-y = 5/18 - 5/9

We need to get a common denominator of 18

-y = 5/18 - 5/9 *2/2

-y = 5/18 -10/18

-y = -5/18

Multiply each side by -1

-1*-y = -5/18 * -1

y = 5/18

Mario earns money mowing his neighbors' lawns.The revenue for mowing x lawns is (X) = 25x.
Mario's cost for gas and the mower rental is (x) = 6x + 15.
His profit from mowing x lawns is p(x) = (r- c)(X). What is p(x)?
A. p(x) = 31x+15
B. p(x) = 19x - 15
C. p(x) = 19x+ 15
O D. p(x) = 31x- 15
SUBMIT

Answers

Answer:

His profit from mowing x lawns is 19x-15

Step-by-step explanation:

Revenue for mowing x lawns = 25x

Cost for gas and the mower rental = 6x+15

We are supposed to find His profit from mowing x lawns

p(x) denotes His profit from mowing x lawns

Profit = Revenue - Cost

So,p(x)=25x-(6x+15)

p(x)=25x-6x-15

p(x)=19x-15

So, Option B is true

Hence His profit from mowing x lawns is 19x-15

Explain the method of place value principle of converting a fraction to decimal with 5 examples for class 7

Answers

Example #1 : 0.7
7 is in the tenths place. This number is read as "seven tenths".
0.7 is converted from 7/10.

Example #2 : 0.13
1 is in the tenths place.
3 is in the hundredths place.
This number is read as "thirteen hundredths"
0.13 is converted from 13/100.

Example #3: 0.157

1 is in the tenths place.
5 is in the hundredths place.
7 is in the thousandths place.
This number is read as "one hundred fifty seven thousandths"
0.157 is converted from 157/1000.

Example # 4: 1.5

1 is in the ones place
5 is in the tenths place.
This number is read as "one and five tenths"
1.5 is converted from 15/10 or 1 5/10.

Example # 5: 25.67
2 is in tens place.
5 is in ones place.
6 is in tenths place
7 is in hundredths place.
This number is read as "twenty-five and sixty seven hundredths"
25.67 is converted from 25 67/100 or 2567/100

Three times a number increased by 7 gives the same result as four times the number increased by 5? Heeellllpppp

Answers

If we were to write this as a mathematical equation, it would look something like this:

3x + 7 = 4x + 5

In order to solve, we would need to isolate the variable. We can do this by subtracting 3x from both sides, after doing which, we are left with this:

7 = x + 5

Then, we subract 5 from both sides to isolate the variable

2 = x

That number you are looking for is 2.

Let's check out work by substituting 2 in for the unknown number in the original problem:

3(2) + 7 = 4(2) + 5

6 + 7 = 8 + 5

13 = 13

And we can see that the numbers do indeed check out.

Your answer is 2.
Hope that helped! =)