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valentina_108 [34]
3 years ago
7

How to solve this equation

Mathematics
1 answer:
Elden [556K]3 years ago
4 0
x = 2 that's the answer 
I don't know how to explain it sorry
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An item is on sale for $12.00. It originally was $16.50.
lbvjy [14]

Answer:

C

Step-by-step explanation:

Decreased price = 16.50 - 12 = $ 4.50

Percent of decrease =

=\frac{4.50}{16.50}*100\\\\= 27.27

= 27%

7 0
3 years ago
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Pls help! What is the value of X?
Alex73 [517]

Answer:

X=4

Step-by-step explanation:

Figure B is .8 times the size of Figure A, so to find the value of x you would take the scale factor and multiply it by 5 in this case.

3 0
3 years ago
10th grade geometry ASAP PLZ HELP
iogann1982 [59]
Angles in a line = 180
180-165 = 15 degrees

15 + 45 + ? = 180
60 + ? = 180
? = 120
7 0
2 years ago
Four baskets contain scented soaps. The baskets contain 9, 9, 11, and 15 soaps. If the soaps are divided evenly among the
Elis [28]

Answer:

11

Step-by-step explanation:

9+9+11+15 = 44

44/4 = 11!

3 0
3 years ago
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Find the dimensions of the rectangle with area 256 square inches that has minimum perimeter, and then find the minimum perimeter
mezya [45]

Answer:

Dimensions: A=a\cdot b=256

Perimiter: P=2a+2b

Minimum perimeter: [16,16]

Step-by-step explanation:

This is a problem of optimization with constraints.

We can define the rectangle with two sides of size "a" and two sides of size "b".

The area of the rectangle can be defined then as:

A=a\cdot b=256

This is the constraint.

To simplify and as we have only one constraint and two variables, we can express a in function of b as:

b=\frac{256}{a}

The function we want to optimize is the diameter.

We can express the diameter as:

P=2a+2b=2a+2*\frac{256}{a}

To optimize we can derive the function and equal to zero.

dP/da=2+2\cdot (-1)\cdot\frac{256}{a^2}=0\\\\\frac{512}{a^2}=2\\\\a=\sqrt{512/2}= \sqrt {256} =16\\\\b=256/a=256/16=16

The minimum perimiter happens when both sides are of size 16 (a square).

4 0
3 years ago
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