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2 years ago

Identify whether the given value of the variable makes the equation true.

Mathematics

1 answer:

Brilliant_brown [7]2 years ago

7 0

- 5 r - 6 = - 26 for r = 4

- 5 * ( 4 ) - 6 = - 26

- 20 - 6 = - 26

- 26 = -26

B) true

hope this helps!

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the function f is defined by f(x)=150/x-z where z is a constant. find z if the value of f at x=1/5 is equal to 250

malfutka [58]

Answer:

x = -1 $\frac{1}{20}$

Step-by-step explanation:

f( $\frac{1}{5}$ ) = 120, therefore we can create this equation:

120 = 150 ÷ ( $\frac{1}{5}$ - z)

cross-multiply to get: 24 - 120z = 150

-120z = 126

z = -1 $\frac{3}{60}$

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2 years ago

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Jesse is playing a game with a number cube with faces numbered 1 through 6. What is the probability of rolling a number that is

lana [24]

Answer:

The probability of rolling a number that is even and a multiple of 3 is $\frac{1}{6}$

Step-by-step explanation:

The total possible outcomes of cube = { 1, 2, 3 , 4 , 5 , 6}

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So, out of all the outcomes, {6) is the ONLY possible favorable outcome.

$\textrm{P(E)} =\frac{\textrm{Number of favorable outcomes }}{\textrm{Total number of outcomes}}$

or, $P(E) = \frac{1}{6}$

Hence, the probability of rolling a number that is even and a multiple of 3 is $\frac{1}{6}$

8 0

3 years ago

Is this complementary, linear pair, vertical, or adjacent?

Lorico [155]

I believe it is Complimentary

7 0

2 years ago

What is the mass of a 7.91cm3 piece of lead having a density of 11.34g/cm

Viktor [21]

Answer:

89.6994g

Step-by-step explanation:

M = DV

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Hope this helps!

8 0

3 years ago

Write a statement that correctly interprets the confidence interval. Choose the correct answer below. A. One has 90% confidence

poizon [28]

Answer:

B. There is a 90% chance that the true value of the population proportion will fall between the lower bound and the upper bound.

Step-by-step explanation:

A. One has 90% confidence that the sample proportion is equal to the population proportion.

Confidence interval gives an interval estimate, not an equality

B. There is a 90% chance that the true value of the population proportion will fall between the lower bound and the upper bound.

Ture.

C. One has 90% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.

Also true but One has 90% confidence is not good interpretation.

D. 90% of sample proportions will fall between the lower bound and the upper bound.

Lower bound and upper bound is given to estimate population proportion.

4 0

2 years ago