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tatiyna
3 years ago
14

Mr. williams physical education class lasts 7/8 hour. Instructions are 1/5 of that time, how many minutes are NOT spent on instr

uctions?
Mathematics
1 answer:
melomori [17]3 years ago
6 0
37/40 but you should probably wait for a second opinion because i bad at math
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Find the base of a parallelogram with height 6 5/8 and area 26 1/2 square feet
Oksi-84 [34.3K]
We know Area = (base)(height) 
<span>Rearrange the equation and solve for base: </span>
<span>base = area/ height </span>
<span>base = (26 1/2)/ (6 5/8) </span>
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3 years ago
A chef plans to mix 100% vinegar with Italian dressing. The Italian dressing contains 12%
Hitman42 [59]

Answer:

Amount of  vinegar. 100% : 20 milliliters

Amount of  Italian dressing: 140 milliliters

Step-by-step explanation:

Let's call A the amount of  vinegar. 100%

Let's call B the amount of  Italian dressing . 12% vinegar

The resulting mixture should have 23%  vinegar, and 160 milliliters.

Then we know that the total amount of mixture will be:

A + B = 160

Then the total amount of pure antifreeze in the mixture will be:

A + 0.12B = 0.23 * 160

A + 0.12B = 36.8

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -1 and add it to the second equation:

-A -B = -160

-A -B = -160

               +

A + 0.12B = 36.8

--------------------------------------

-0.88B = -123.2

B = \frac{-123.2}{-0.88}

B = 140\ milliliters

We substitute the value of B into one of the two equations and solve for A.

A + 140 = 160

A = 20\ milliliters

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Hii, does anyone know a example for 28 + 29? thanks
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Answer:

57

Step-by-step explanation:

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Answer:

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