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3 years ago

Please help! Answers: 15 70 55 105

Mathematics

1 answer:

yulyashka [42]3 years ago

7 0

Equation:
$3x + 10 = (180 - (5x - 5) ) \div 2 \\ ... \\ x = 15 \\$
3x+10 = 45+10 = 55
The answer is 55 because this is a isosceles triangle.

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This is the call plan for Robert's cell phone:

butalik [34]

To answer this, first make an equation representing the data:

15+ 0.20X= Bill

now plug in data you know:

15 + 0.20(30)= bill

and finally solve it:
Bill= $21.00

4 0

3 years ago

Read 2 more answers

Can someone help me with number 10, 11, 12, 15, and 16 I don’t understand them thanks

yanalaym [24]

10)

$10^2-48:6+25*3=100-8+75=167$

11)

$8(\frac{16}{4} )+2^2-11*3=32+4-33=3$

12)

$(\frac{6}{3} +4)^2:4*7=(2+4)^2:4*7=6^2:4*7=36:4*7=9*7=63$

13) (your answer is incorrect)

$5(9-4)^2-3^2=5*5^2-3^2=5*25-9=125-9=116$

14) (your answer is incorrect)

$5^2-2^2*4^2-12=25-4*16-12=25-64-12=-51$

15)

$(\frac{50}{5^2} )^2:4=(\frac{50}{25} )^2:4=2^2:4=4:4=1$

16)

$\frac{24+32+30+28}{2}$ -expression to represent this situation

$\frac{24+32+30+28}{2}=\frac{114}{2}=57$

Answer: In 1 group 57 students

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P.S. Hello from Russia :^)

4 0

2 years ago

<img src="https://tex.z-dn.net/?f=%20%7B3%7D%5E%7Bx%20%2B%202%7D%20%20-%20%20%7B3%7D%5E%7Bx%7D%20%20%3D%20%20%5Cfrac%7B8%7D%7B9%

ser-zykov [4K]

$3^{x + 2}$ - $3^{x}$ = $3^{x}$ * $3^{2}$ - $3^{x}$ = 9( $3^{x}$ ) - 1( $3^{x}$ ) = 8( $3^{x}$ )

$3^{x + 2}$ - $3^{x}$ = $\frac{8}{9}$

⇒ 8( $3^{x}$ ) = $\frac{8}{9}$

⇒ $3^{x}$ = $\frac{1}{9}$ <em>multiplied both sides by 8</em>

⇒ $3^{x}$ = $\frac{1}{3^{2} }$

⇒ $3^{x}$ = 3⁻²

⇒ x = -2

Answer: x = -2

6 0

2 years ago

Select the correct answer from each drop-down menu. one person working alone will take 30 days to paint an apartment. if d repre

Oksanka [162]

It took 3 days to complete a work by 10 people.

<h3>What is Efficiency?</h3>

The efficiency is the output of the work which we divide by the work input and then express it in a percentage form.

Here, Efficiency of 1 person to complete a piece of work in 30 days is 1/30.

The number of days to complete the work = n days

Number of person to complete the work = p.

Now, according to question

Number of days to complete the work by 10 people = 30 / 10

= 3 days.

Thus, it took 3 days to complete a work by 10 people.

Learn more about Efficiency from:

brainly.com/question/13828557

#SPJ1

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2 years ago

What is 607-568 rounded off to the nearest 100

stellarik [79]

Answer:

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8 0

3 years ago