Select the correct difference. -3z 5 - (-7z 5) (A)-10z5 (B)-4z5 (C)4z5 (D)4z

Mathematics

1 answer:

kogti [31]3 years ago

8 0

Answer:

Correct choice is (C). $4z^5$ .

Step-by-step explanation:

Given expression is $-3z^5-\left(-7z^5\right)$ .

Now we need to simplify that then select the correct difference value from the given choices.

$-3z^5-\left(-7z^5\right)$

negative times negative is positive

$=-3z^5+7z^5$

Combine like terms because variable z has same exponent.

$=(-3+7)z^5$

$=4z^5$

Hence correct choice is (C). $4z^5$ .

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Oksi-84 [34.3K]

Answer:

(a) 0.6

(b) 0.4

Step-by-step explanation:

If I am reading the little table right, You have made 9 shots, and have missed 6 of them. Therefore, in total, you have made $9+6=15$ shots.

The definition of probability is the number of events of a desired outcome divided by the total number of outcomes. Since you wish to make a shot for part a, the number of desired outcomes thus far is 9, out of 15 total shots. Thus,

$P($ making a shot $)=\frac{9}{15}=\frac{3}{5}=0.6$

Since making a shot and not making a shot are mutually exclusive events, and the only two events that could occur when shooting a basket, the probability of not making a shot and the probability of making a shot are all of the possible outcomes, and is thus equal to 1.

$P($ making a shot $)+P($ missing a shot) $=1$