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3 years ago

3/7 of the students in a school are in sixth grade.

Mathematics

1 answer:

Andre45 [30]3 years ago

7 0

Answer:

90 students

Step-by-step explanation:

Set up a proportion

3/7 = x/210 cross multiply and solve for x

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James works at a clothing store where he earns a 4% commission on his total sales How much does James earn from commission on a

Rashid [163]

Answer:

101.60

Step-by-step explanation:

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2 years ago

Help! Exponential Equation WITHOUT CALCULATOR

ale4655 [162]

$
1.
(2^{x} -2^{-x})^{2} = 4^{2} \\ \\2^{2x}-2*2^{x}*2^{-x} + 2^{-2x} =4^{2} \\ \\2^{2x}-2*2^{x-x} + 2^{-2x} =4^{2} \\ \\ 2^{2x}+ 2^{-2x} - 2=16 \\ \\ 2^{2x}+ 2^{-2x} = 18

\\ \\ 2.( 2^{x})^{3} - (2^{-x}^) ^{3}= (2^{x} -2^{-x})(2^{2x}+2^{x}*2^{-x}+2^{-2x})
\\ \\ ( 2^{x})^{3} - (2^{-x}^)^{3}=(2^{x} -2^{-x})(2^{2x}+2^{-2x}+2^{x}*2^{-x})
\\ \\ ( 2^{x})^{3} - (2^{-x}^)^{3}=(2^{x} -2^{-x})(2^{2x}+2^{-2x}+1)
\\ \\ ( 2^{x})^{3} - (2^{-x}^)^{3}=(2^{x} -2^{-x})((2^{2x}+2^{-2x})+1)
$

$\\ \\ ( 2^{x})^{3} - (2^{-x})^{3} =(4)((18)+1)= 76
\\ \\ 2^{3x}-2^{-3x} =76
$

4 0

3 years ago

Need help asap!!! just number 5 i’ll give you brainiest answer!

liberstina [14]

Answer:

Step-by-step explanation:

(3x + 2) + (x - 4) = 90

4x - 2 = 90

4x = 92

x = 23

m∠A = (3(23) + 2) = 71°

3 0

3 years ago

Read 2 more answers

if your teacher tells you to do questions 28 through 41 in your math book for homework, how many questions is that

katrin2010 [14]

Its 14.
30-40 is 11, 28-29 is 2, and 41 is 1.

5 0

3 years ago

If JK answered / of the Math questions correctly, how many points did she get in a 50- item test?

Fittoniya [83]

Answer:

JK got 30 answers correct on a 50 item test.

Step-by-step explanation:

It is given that:

Total items on test = T = 50

Fraction of total items that were answered correctly = 3/5

We simply have to multiply the total number of questions by the fraction of correct answers.

So,

The correct answered number of items are:

$= \frac{3}{5} * 50\\=30$

Hence,

JK got 30 answers correct on a 50 item test.

4 0

3 years ago