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3 years ago

If the 16 boys in the classroom are 40% of the class how many students are there in the class

Mathematics

2 answers:

Galina-37 [17]3 years ago

8 0

Answer:

Step-by-step explanation:

40+16=56

AlladinOne [14]3 years ago

5 0

Answer:

Step-by-step explanation:

Set up the equation.

Let the full number of people in the classroom = x

(40%) x = 16 Change 40% to a fraction

(40/100) x = 16 Reduce 40/100 to a decimal

0.4 x = 16 Divide by 0.4

0.4/0.4 x = 16/0.4

x = 40

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3X squared plus 2X equals -4 number of solutions

PIT_PIT [208]

Answer:

The given equation has two solutions i.e $\frac{-1+\sqrt{13} }{3}$ , $\frac{-1-\sqrt{13} }{3}$

Step-by-step explanation:

The given expression as :

3 x² + 2 x - 4

For the quadratic equation in the form of a x² + b x + c , the value of x

x = $\frac{-b\pm \sqrt{b^{2}-4\times a\times c}}{2\times a}$

Or, x = $\frac{-2\pm \sqrt{2^{2}-4\times 3\times (-4)}}{2\times 3}$

Or, x = $\frac{-2\pm \sqrt{4 + 48}}{6}$

or, x = $\frac{-2\pm \sqrt{52}}{6}$

∴ x = $\frac{-1\pm \sqrt{13}}{3}$

Or, x = $\frac{-1+\sqrt{13} }{3}$ , $\frac{-1-\sqrt{13} }{3}$

Hence The given equation has two solutions i.e $\frac{-1+\sqrt{13} }{3}$ , $\frac{-1-\sqrt{13} }{3}$ Answer

7 0

3 years ago

at a sale on winter clothing, jacquie bought 2 pairs of gloves and 4 hats for 43$. julia bought 2 pairs of gloves and 2 hats for

TEA [102]

2g + 4h = 43

2g + 2h = 30

2h = 13

h = 6.5

2g + 26 = 43

2g = 17

g = 8.5

1 glove is $8.50 and 1 hat is $6.50

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3 years ago

- Explain the difference between BC and<br> CB.

Olenka [21]

Answer:

BC and AD mean the same thing as BCE and CE. Image via Artoba Tours.

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Marta_Voda [28]

Answer:

Step-by-step explanation:

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Shtirlitz [24]

<span>n = 9 * 27 + 2 * 31 - 28
n = 243 + 62 - 28
n = 305 - 28
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Firstly do the multiplications and divisions, then additions and substractions.

Hope I could help :)</span>

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3 years ago