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4 years ago

Solve. −9.8+(−5.9)+u=−12.4 u=? A: 3.3 B:-8.5 C:-28.1 D:15.7

Mathematics

2 answers:

Finger [1]4 years ago

8 0

The best way to solve this is to simply substitute all given answers for u.

The answer is A) 3.3

nasty-shy [4]4 years ago

4 0

The answer is A, 3.3. You first want to distribute the + symbol to the 5.9, which will make it still a negative. From then you want to combine like terms so you can add -9.8+-5.9. That should be equal to -15.7. Your equation now is looking like -15.7+u=-12.4. You want to leave the u alone so now you have to do the opposite of -15.7 which is add 15.7. What you do to one side, you do to the other. Now add 15.7 to -12.4. That should be 3.3. Now it looks like u=3.3 which is your answer.

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Answer:

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4 0

4 years ago

The radius of the base of a cylinder is decreasing at a rate of 121212 kilometers per second. The height of the cylinder is fixe

WARRIOR [948]

Answer:

7536 $km^3/sec$

Step-by-step explanation:

Given that:

Rate of decreasing of radius = 12 km/sec

Height of cylinder is fixed at = 2.5 km

Radius of cylinder = 40 km

To find:

The rate of change of Volume of the cylinder?

Solution:

First of all, let us have a look at the formula for volume of a cylinder.

$Volume = \pi r^2h$

Where $r$ is the radius and

$h$ is the height of cylinder.

As per question statement:

$r$ = 40 km (variable)

$h$ = 2.5 (constant)

$\dfrac{dV}{dt} = \dfrac{d}{dt}\pi r^2h$

As $\pi, h$ are constant:

$\dfrac{dV}{dt} = \pi h\dfrac{d}{dt} r^2\\\Rightarrow \dfrac{dV}{dt} = \pi h\times 2 r\dfrac{dr}{dt} \\$Putting the values:$\\\Rigghtarrow\dfrac{dV}{dt} = 3.14 \times 2.5\times 2 \times 40\times 12 \\\Rigghtarrow\dfrac{dV}{dt} = 7536\ km^3/sec$

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3 years ago

Which number line shows the solution to 11x + 14 < –8?

Alika [10]

Answer:

positive 11x+ positive 14 to the right is greater than negative 8 to the left

Step-by-step explanation:

hope I helped

4 0

3 years ago

Read 2 more answers

A recent study by Ohio State University reported at Science Daily suggests that students with cell phones may take more risks th

777dan777 [17]

Answer:

The value of the test statistic z for this hypothesis test is -2.79

Step-by-step explanation:

Consider the provided information.

To calculate the test statistic use the formula:

$z=\frac{\hat p-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}$

Where, z is Test statistics, n is Sample size, p₀ = Null hypothesized value and $\hat p$ = Observed proportion.

p₀ = 0.50

Thus 1-p₀= 0.50

42% responded that if they had a cell phone, thus $\hat p=0.42$

The sample size is 305.

Substitute the respective values in the above formula.

$z=\frac{0.42-0.50}{\sqrt{\frac{0.50(0.50)}{305}}}$

$z=\frac{-0.08}{\sqrt{0.00082}}$

$z=-2.79$

Hence, the value of the test statistic z for this hypothesis test is -2.79

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3 years ago

How do I solve a b and c

DedPeter [7]

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a. 6×1.25=x 6×1.333=x 6×1.5=x 6×1.75=x 6×2=x make sense?
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4 years ago