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3 years ago

Help me plsssssssssssss!Of the 420 students enrolled in advanced math at college, only 30% are first-year students.

Mathematics

1 answer:

sergij07 [2.7K]3 years ago

5 0

Answer:

126 students are first-year students.

Step-by-step explanation:

The answer is 126 because 30% of 420 is 126.

P.S Can I have brainliest?

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The value of square root of -9 is not -3 because

andriy [413]

Answer:

The square root of -9 cannot be -3 because -3 squared or -3 times -3 equals 9 not -9.

Hope this helps!

6 0

3 years ago

Mike's Music charges $45 per hour. Tim's Tunes

klemol [59]

Answer:

Answer 4. (5 1/3 hours)

Step-by-step explanation:

240/45=5.333333333

5 0

2 years ago

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In order to earn extra money during the summer , omar is babysitting . The amount of money depends on the number of hours he bab

luda_lava [24]

M is dependent and h is independent
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3 years ago

Solve for x in the equation x squared + 2 x + 1 = 17.

Papessa [141]

Answer:

$x = - 1 + \sqrt{17}\\and\\x = - 1 - \sqrt{17}\\$

Step-by-step explanation:

given equation

$x^2 +2x +1 = 17$

subtracting 17 from both sides

$x^2 +2x +1 = 17\\x^2 +2x +1 -17= 17-17\\x^2 +2x - 16 = 0\\$

the solution for quadratic equation

$ax^2 + bx + c = 0$ is given by

x = $x = -b + \sqrt{b^2 - 4ac} /2a \\\\and \ \\-b - \sqrt{b^2 - 4ac} /2a$

________________________________

in our problem

a = 1

b = 2

c = -16

$x =( -2 + \sqrt{2^2 - 4*1*-16}) /2*1 \\x =( -2 + \sqrt{4 + 64}) /2\\x =( -2 + \sqrt{68} )/2\\x = ( -2 + \sqrt{4*17} )/2\\x = ( -2 + 2\sqrt{17} )/2\\x = - 1 + \sqrt{17}\\and\\\\x = - 1 - \sqrt{17}\\$

thus value of x is

$x = - 1 + \sqrt{17}\\and\\x = - 1 - \sqrt{17}\\$

3 0

2 years ago

The original price is $40.90 and the sale price is 30% off what would be two different expressions for the equation?

Ann [662]

Answer:

(40.90 ÷ 100) × 30

And

0.3 × 40.90

8 0

3 years ago