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olga_2 [115]
4 years ago
9

In a class of 30 students, 18 are boys.what percent of students are girls

Mathematics
1 answer:
SIZIF [17.4K]4 years ago
4 0

There are 30-18 = 12 girls. Their percentage is

... 12/30 × 100% = 40%

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What type of angle are 2 and 6?
horsena [70]

Answer:

CORRESPONDING ANGLES

Step-by-step explanation:

6 0
2 years ago
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Find the area under the curve y = 13/x3 from x = 1 to x = t. Evaluate the area under the curve for t = 10, t = 100, and t = 1000
zvonat [6]

Answer:

t = 10

A = 32496.75

t = 100

A = 324999996.8

t = 1000

A=3.25\times 10^{12}

Step-by-step explanation:

The area under the curve is calculated by using the following definite integral:

A = \int\limits^t_ {1} \,{13\cdot x^{3}}  dx

A = 13 \int\limits^t_1 {x^{3}} \, dx

A = \frac{13}{4}\cdot (t^{4}-1)

Evaluated areas are presented below:

t = 10

A = 32496.75

t = 100

A = 324999996.8

t = 1000

A=3.25\times 10^{12}

8 0
3 years ago
Sydawna has two part-time jobs. Her earnings for one week are represented by the equation: E = 9.25g + 10.50t
Iteru [2.4K]

Answer:

  • 9 hours

Step-by-step explanation:

<u>Given the equation: </u>

  • E = 9.25g + 10.50t
  • E - weekly total, g- number of hours at gas station, t- number of hours at toy store.

<u>Substitute given values into equation and solve for the missing one:</u>

  • 219.75 = 9.25g + 10.5*13
  • 219.75 = 9.25g + 136.5
  • 9.25g = 219.75 - 136.5
  • 9.25g = 83.25
  • g = 83.25/9.25
  • g = 9

Sydawna works 9 hours at the gas station

4 0
3 years ago
2x+8(x+3) = 3(x-13)<br><br><br> please show the work, i’ll mark brainliest
tigry1 [53]

Answer:

x = -9

Step-by-step explanation:

2x + 8( x + 3 ) = 3( x - 13 )

Dstribute;

2x + 8 ( x + 3 ) = 3 ( x - 13 )

2x + ((8)(x)) + ((8)(3)) = ((3)(x)) - ((13)(3))

2x + 8x + 24 = 3x - 39

Combine like terms;

2x + 8x + 24 = 3x - 39

10x + 24 = 3x - 39

Inverse operations;

10x + 24 = 3x - 39

-3x            -3x

7x + 24 = -39

     -24     -24

7x = - 63

/7       /7

x = -9

3 0
3 years ago
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Write the equation of the line that passes through the point (-2, 4) and has a slope of -1.
olganol [36]

y = -1x + 2

Put the points in the slope equation to find (-1 as m, -2 as x, and 4 as y)

y = mx + b

4 = -1(-2) + b

4 = 2 + b

4 - 2 = b

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Final equation: y = -1x + 2

7 0
3 years ago
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