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Bingel [31]
3 years ago
8

3(x − 5) − 5x = −25 + 6x

Mathematics
2 answers:
guajiro [1.7K]3 years ago
8 0

Answer:

x = \frac{5}{4}

Step-by-step explanation:

3(x - 5) - 5x = - 25 + 6x ← distribute parenthesis and simplify left side

3x - 15 - 5x = - 25 + 6x

- 2x - 15 = - 25 + 6x ( subtract 6x from both sides )

- 8x - 15 = - 25 ( add 15 to both sides )

- 8x = - 10 ( divide both sides by - 8 )

x = \frac{-10}{-8} = \frac{5}{4}

Alekssandra [29.7K]3 years ago
5 0

x=5/4

the explantion would be to long lol

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A submarine travels N45 W 16 miles. It then turns a course of 216 measured clockwise off of due north and travels until it is du
lozanna [386]

Answer:

19.5 miles

Step-by-step explanation:

The question is represented in the image attached.

∠A = 45°, ∠B = 45° + (216° - 180°) = 81°

∠A + ∠B + ∠C = 180° (sum of angles in a triangle)

45° + 81° + ∠C = 180°

126 + ∠C = 180

∠C = 180 - 126

∠C = 54°

The sine rule states that for a triangle with sides a, b, c and their corresponding opposite angles A, B and C. The following rule holds:

\frac{a}{sin(A)}= \frac{b}{sin(B)}= \frac{c}{sin(C)}

b = length of beginning of submarine to end point. Using sine rule:

\frac{b}{sin(81)} =\frac{16}{sin(54)} \\\\b=\frac{16}{sin(54)}*sin(81)\\\\b=19.5\ miles

7 0
3 years ago
In a math class of 40 students, there are 21 female students. Which of the following does NOT represent a ratio of the number of
babymother [125]

Answer:

Everything except 21/40. That is your ratio. The denominator always

6 0
3 years ago
For a binomial probability distribution, it is unusual for the number of successes to be less than μ − 2.5σ or greater than μ +
kirill [66]

Answer:The correct option is a)

The upper limit of successes that would be deemed to be usual is 5, so more than 5 successes would be unusual.

Step-by-step explanation:

The mean of a binomial distribution

μ= np where n=10 and p= 0.2 q= 1-p, q= 1-0.2=0.8

μ= 10×0.2=2

σ=√npq

σ=√10×0.2×0.8=1.26

Is unusual for the number of success to be greater than μ + 2.5σ.

= 2+2.5(1.26)

=5 approximately.

So it is unusual for it to be greater than 0.5. The right option Is a)

7 0
3 years ago
Look at pic 10 pts will mark brainilest
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Answer:

1,400

Step-by-step explanation:

Evaluate for x=2

100(2^3+2^2+2)

=1400

PLZ give me brainliest

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3 years ago
12,34761 (a) What is this number called? (b) How are the digits after the comma represented? (c) How many decimal places does th
zavuch27 [327]

This is a seven digits number that includes five decimal places. Moreover, the first digit after the comma is considered to be 1/10.

<h3>What is this number called?</h3>

This number is twelve three four seven six one.

<h3>How many decimal numbers does it have?</h3>

All numbers after the comma are decimal, therefore there are 5 decimal numbers.

<h3>How are the decimal numbers represented?</h3>

The first decimal number is represented as 3/10, the second one is 4/100, the third one is 7/1000, the fourth one is 6/10000, and the last one is equivalent to 1/100000.

Learn more about decimal numbers in: brainly.com/question/4708407

#SPJ1

3 0
2 years ago
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