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tino4ka555 [31]
3 years ago
9

(10x – 2) - (2x - 7) O 8x + 5 O 12.2 + 5 o 12c - 9 O 83 -9

Mathematics
1 answer:
Yuki888 [10]3 years ago
8 0

Answer:

the first one

8x+5

Step-by-step explanation:

10x-2-2x+7= 8x+5

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Need answers ASSAP
ollegr [7]
Data:
r (radius) = 3.5 in
h (height) = 8 in
Adopt: \pi \approx3.14
V (volume) = ?
Ink cost per cubic inch = $0.05/in³
Total cost: ?

<span>Calculate the volume of the paint bucket (its formed being cylindrical), we have:
</span>V =  \pi *r^2*h 
V = 3.14 *3.5^2*8 
V = 3.14*12.25*8
\boxed{V = 307.72\:in^3}

<span>What was the total cost of the paint?

</span>price($)___measure(in³)
0.05 ---------- 1
y -------------- 307.72

It is made the rule of three: (<span>directly proportional)
</span>
\frac{0.05}{y} = \frac{1}{307.72}
multiply cross
1*y = 0.05*307.72
y = 15.386\:\to\:\boxed{\boxed{y\approx\$15}}\end{array}}\qquad\quad\checkmark

Answer:
<span>the total cost of the paint is $15</span>
7 0
3 years ago
Mica bought a new smart phone for $258.13. That was the price after his 18.25% discount. What was the original price of the phon
julia-pushkina [17]

The original price of phone is $ 315.76

<em><u>Solution:</u></em>

Given that Mica bought a new smart phone for $ 258.13.

That was the price after his 18.25% discount

<em><u>To find: original price of phone</u></em>

From given question,

price after discount = $ 258.13

discount = 18.25 %

Let "x" be the original price of phone

price after discount = original price - discount

258.13 = x - 18.25 \% \text{ of } x

258.13 = x - \frac{18.25}{100}x

258.13 = x(1 - \frac{18.25}{100})

258.13 = x(1 - 0.1825)\\\\258.13 = x( 0.8175)\\\\x = \frac{258.13}{0.8175}\\\\x = 315.76

Thus original price of phone is $ 315.76

4 0
4 years ago
Can yall help me out real quick. unit 6 similar triangles homework 3 proving triangles similar. 65 points for this question. Rea
Vesna [10]

Answer:

1, 2 and 7

Step-by-step explanation:

they look the same, have a good day!!

5 0
3 years ago
Solve for x: 2(x-3)+5=4-7(2x-1)
Marat540 [252]
Solve for x by simplifying both sides of the equation , then isolating the variable 
your answer is x=3/4
3 0
3 years ago
What is the 100th term of the sequence with a1=222 and d=-5
shusha [124]

Answer:

--273

Step-by-step explanation:

100th term is equal a1 + 99d so

100th term = 222 + (-5×99) = -273

6 0
3 years ago
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