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daser333 [38]
3 years ago
12

There are 80 students total in 7th grade, of whom 15% are left handed. How many

Mathematics
1 answer:
nika2105 [10]3 years ago
5 0
15% translates to 15/100 as a fraction.

If you multiply that by the number of student there are (80) you’d get the 15% of students who are left handed.

80(15/100)=12

12 students are left-handed
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Find the measure of the are or central angle indicated. Assume that lines which appear to be
Alina [70]

9514 1404 393

Answer:

  ?° = 153°

Step-by-step explanation:

The measure of an arc is the same as the measure of the central angle it subtends. The arc is marked 153°. The central angle (?°) has that same measure.

  ?° = 153°

5 0
3 years ago
Please answer the WHOLE question and explain!
exis [7]

The total weight of candies is unknown. Let x = the total weight of candies.

"One student ate 3/20 of all candies and another 1.2 lb":

The first student ate (3/20)x plus 1.2 lb which is 0.15x + 1.2.

"The second student ate 3/5 of the candies and the remaining 0.3 lb."

The second student ate (3/5)x and 0.3 lb which is 0.6x + 0.3.

Altogether the 2 students ate 0.15x + 1.2 + 0.6x + 0.3.

That was all the amount of candies, so that sum equals x.

0.15x + 1.2 + 0.6x + 0.3 = x

Now we solve the equation for x to find what the total amount of candies was.

0.75x + 1.5 = x

-0.25x = -1.5

x = 6

The total amount of candies was 6 lb.

The first student ate 0.15x + 1.2 = 0.15(6) + 1.2 = 0.9 + 1.2 = 2.1, or 2.1 lb of candies.

The second student ate 0.6x + 0.3 = 0.6(6) + 0.3 = 3.6 + 0.3 = 3.9, or 3.9 lb of candies.

Answer: The first student ate 2.1 lb of candies, and the second student ate 3.9 lb of candies.

7 0
3 years ago
Sor-rey for posting again,I messed up on my last one...anyway,100 points and Brainlest! Please help ASAP!
Triss [41]

The answer of 4(2x^3 y^4 )^4/2(2x^2 y^6 )^3  after simplification will be

4 x^{6}  y^{-2}

Step-by-step explanation:

To simplify

\frac{4(2x^3 y^4 )^4}{2(2x^2 y^6 )^3} .

Using exponential law the exponents of variables will be added when multiplied as per rule

we get

\frac{4[(2^4)(x^{3\times 4}) ( y^{4\times4} )] }{2[(2^3)(x^{2\times3} ) (y^{6\times3} )]}\\

\frac{4[(16)(x^{12}) ( y^{16} )] }{2[(8)(x^{6} ) (y^{18} )]}\\\\\frac{64x^{12}y^{16}  }{16 x^{6}y^{18}  }

Now by dividing according to exponential rule the exponents of variables will be subtracted as per rule

(\frac{64}{16} ) x^{12-6}  y^{16-18} \\4 x^{6} y^{-2}

So the answer of 4(2x^3 y^4 )^4/2(2x^2 y^6 )^3  after simplification will be

4 x^{6}  y^{-2}

Keywords: Algebra

Learn more about algebra at:

  • brainly.com/question/3739260
  • brainly.com/question/13168205
  • brainly.com/question/9607945

#learnwithBrainly

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3 years ago
Find an equation in standard form for the ellipse with the vertical major axis of length 16 and minor axis of length 10.
Sedbober [7]

Answer: The second answer

Step-by-step explanation:

7 0
3 years ago
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How do you find the value of a variable and the lenght of it sides?
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Setting them equal to whatever the perimeter is 
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