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Andrei [34K]
2 years ago
10

3r/4= 1/8 what's the value of r

Mathematics
2 answers:
olya-2409 [2.1K]2 years ago
8 0
\frac{3r}{4} =\frac{1}{8}

Cross multiply.
Note: \sf\frac{a}{b} = \frac{c}{d} \to ad=bc

Cross multiplying we get:

3r(8) = 4(1) \\ 24r = 4\\r = \frac{4}{24} \\\\r=\frac{1}{6}

I hope that helps :)
tino4ka555 [31]2 years ago
5 0
Multiplying both sides by 8, we see that 6r=1.  Dividing by 6, r=1/6.
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What is the differentiation of f(x) =2x^4/5?
motikmotik
\bf f(x)=\cfrac{2x^4}{5}\implies f(x)=\cfrac{2}{5}x^4\implies \cfrac{df}{dx}=\cfrac{2}{5}\cdot 4x^3\implies \cfrac{df}{dx}=\cfrac{8x^3}{5}

notice, the 2/5 is just a "scalar" value, so you can just get the derivative of the variable part and slap the scalar as its factor.
6 0
2 years ago
Find the measures of:<br><br>all angles if 3(m∠1+m∠3) = m∠2+m∠4
slavikrds [6]

Answer:

Part 1) m∠1=45°

Part 2) m∠3=45°

Part 3) m∠2=135°

Part 4) m∠4=135°

Step-by-step explanation:

we know that

m∠1=m∠3 -----> by vertical angles Equation A

m∠2=m∠4 -----> by vertical angles Equation B

m∠1+m∠2=180° ----> by supplementary angles (linear pair) Equation C

3(m∠1+m∠3) = m∠2+m∠4 ----> Equation D

Substitute equation A and equation B in equation D

3(m∠1+m∠1) = m∠2+m∠2

6(m∠1) = 2m∠2

3(m∠1) =m∠2 -----> equation E

Substitute equation E in equation C and solve for m∠1

m∠1+3(m∠1)=180°

4(m∠1)=180°

m∠1=45°

<em>Find the measure of m∠3</em>

Remember that

m∠1=m∠3 (equation A)

therefore

m∠3=45°

<em>Find the measure of m∠2</em>

Remember that

m∠2=3(m∠1) (equation E)

substitute the value of m∠1

m∠2=3(45°)=135°

<em>Find the measure of m∠4</em>

Remember that

m∠2=m∠4 (equation B)

therefore

m∠4=135°

4 0
2 years ago
A value two standards deviation from the mean is more likely to occur than a value three standard deviations from the mean.
Alexxandr [17]

Answer:

A value two standards deviation from the mean is more likely to occur than a value three standard deviations from the mean.

Step-by-step explanation:

Standard deviation is a quantitative measure of the variability of traits of the subjects in a given population. These traits can range from age, height, weight e.t.c. This deviation is brought about by extreme or abnormal conditions, which is the reason why two deviations is more likely to occur than three deviations.

Moreover, going by the provisions of the empirical rule, If data comes from a population that is approximately symmetrical;

95% of the data will fall within two standard deviations.

99.7% will fall within three standard deviations

Find the attachment below.

Nevertheless, in a symmetrical distribution most of the data values fall around the mean. Two standard deviations is closer to the mean than 3 standard deviations hence more likely to occur.

5 0
3 years ago
Read 2 more answers
1.
MatroZZZ [7]

Answer:

97.5 miles

Step-by-step explanation:

d = 65t

where d is the distance in miles and t is the time in hours

Therefore, to calculate how many miles the car travels in 1.5 hours, substitute t = 1.5 into the equation:

d = 65 x 1.5 = 97.5 miles

5 0
2 years ago
How to work this problem 736.5 x .78
Sholpan [36]
<h2>Answer=. 736.5 x .78 =574.47</h2>

8 0
2 years ago
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