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Shtirlitz [24]
3 years ago
9

What is x in 3x - 7 = 11

Mathematics
2 answers:
Darina [25.2K]3 years ago
8 0
The answer is 6 :)))
Anna35 [415]3 years ago
3 0

Answer:

x = 6

Step-by-step explanation:

3x - 7 = 11

3x = 11 + 7

3x = 18

x = 6

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What is the cross-sectional area of a cement pipe 2 in. thick with an inner diameter of 5 ft? Use pie 3.14.
Paul [167]

Answer:

1.60 ft^{2}

Step-by-step explanation:

Assuming that this is a cylindrical pipe, the area can be determined by applying the formula for calculating the area of a circle.

i.e Area = \pir^{2}

So that,

for the inner part of the pipe,

r = \frac{diameter}{2}

 = \frac{5}{2}

 = 2.5 feet

Area of the inner part of the pipe = \pir^{2}

                                 = 3.14 x (2.5)^{2}

                                 = 19.625

Are of the inner part of the pipe is 19.63 ft^{2}.

Total diameter of the pipe = 5 + 0.2

                                           = 5.2 feet

r = \frac{5.2}{2}

 = 2.6 feet

Area of the pipe = \pir^{2}

                            = 3.14 x (2.6)^{2}

                            = 21.2264

Area of the pipe is 21.23 ft^{2}.

Thus the cross sectional area = Area of the pipe - Area of the inner part of the pipe

                                           = 21.2264 - 19.625

                                           = 1.6014

The cross sectional area of the cement pipe is 1.60 ft^{2}.

6 0
3 years ago
WHAT IS A EXPANDING FRACTION
Hitman42 [59]
 <span>In algebra, the </span>partial fraction<span> decomposition or </span>partial fraction expansion<span> of a rational function (that is a </span>fraction<span> such that the numerator and the denominator are both polynomials) is the operation that consists in expressing the </span>fraction<span> as a sum of a polynomial (possibly zero) and one or several </span>fractions<span> .</span>
7 0
3 years ago
Read 2 more answers
If |14 -2x = 20, x could equal which of the following?
RSB [31]

Answer:

x would equal -3

Step-by-step explanation:

want to get rid of 14 from each side so 14 - 14 would get rid of that 20 - 14 = 6 now you still have a negative 2x

-2x / -2x gives you X to be alone now divide 6 with -2 which gives you -3

8 0
3 years ago
5/8 = 2m + 3/8 <br><br> Please help
DIA [1.3K]
<span>5/8 = 2m + 3/8 
Subtract 3/8 from 5/8
2/8=2m
Divide 2 on both sides
Final Answer: 2/16 or 1/8 *Both answers are equivalent to each other.</span>
7 0
4 years ago
Rewrite as an exponential equation ln7=x
zvonat [6]

Answer:

As an exponential equation, it is e^{x} = 7

Step-by-step explanation:

Logarithm of base e:

\ln{a} = b means that e^b = a

In this question:

We are given:

\ln{7} = x

Which means that the exponential equivalent is given by:

e^{x} = 7

6 0
3 years ago
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