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3 years ago

Somebody help me with this question!

Mathematics

2 answers:

dimulka [17.4K]3 years ago

7 0

$\frac{z\cdot z\cdot z\cdot z\cdot z\cdot z\cdot z}{z\cdot z}=\frac{z^7}{z^2}=z^{7-2}=\boxed{z^5}$

Cerrena [4.2K]3 years ago

4 0

Answer:

$\frac{ {z}^{7} }{ {z}^{2} }$

= z to the power of 5

Step-by-step explanation:

I am 100% sure with this answer

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(b^4)^2 need help plz

lisov135 [29]

<span>(b^4)^2 = b^(4x2) = b^8

answer
b^8</span>

6 0

3 years ago

Consider two boxes, one containing one black and one white marble, the other, two black and one white marble. A box is selected

valina [46]

Answer:

$\frac{7}{12}$

Step-by-step explanation:

Probability refers to chance of happening of some event.

Conditional probability is the probability of an event A, given that another event B has already occurred.

$B_1,B_2$ denote the two boxes.

In box $B_1$ :

No. of black balls = 1

No. of white balls = 1

In box $B_2$ :

No. of black balls = 2

No. of white balls = 1

Let B, W denote black and white marble.

So, probability that either of the boxes $B_1,B_2$ is chosen is $\frac{1}{2}$

Probability that a black ball is chosen from box $B_1$ = $\frac{1}{2}$

Probability that a black ball is chosen from box $B_2=\frac{2}{3}$

To find:probability that the marble is black

Solution:

Probability that the marble is black = $\frac{1}{2}(\frac{1}{2} )+\frac{1}{2}(\frac{2}{3})=\frac{1}{4}+\frac{1}{3}=\frac{7}{12}$

6 0

3 years ago

Cathy lives in a state where speeders are fined $15 for each mile per hour over the speed limit. Cathy was given a ticket for $1

Simora [160]

Answer:

Cathy was driving at a speed of 67 miles per hour.

Step-by-step explanation:

Fined $15 for each mile per hour over the speed limit. Cathy was given a ticket for $105.

We solve this using a rule of three.

1 mile - $15

x miles - $105

Applying cross multiplication:

15x = 105

x = 105/5 = 7.

Cathy was 7 miles above the speed limit.

How fast was Cathy driving?

7 miles above the speed limit of 60 miles per hour, so 60 + 7 = 67 miles per hour.

Cathy was driving at a speed of 67 miles per hour.

3 0

3 years ago

The length of a rectangle is three times its width. The perimeter is 72 feet. What is the width of the rectangle in feet? A. 9 B

miskamm [114]

W=9ft.

since the with is 9 that means the length is 27.then add up the sides to get the perimeter. 9+9+27+27=72

8 0

3 years ago

Read 2 more answers

I need help hehe? Dshbs

Butoxors [25]

Answer:

Half

Step-by-step explanation:

$\left(\dfrac{22}7 - \dfrac 23 \right) \div 2 = \left(\dfrac{22}7 - \dfrac 23 \right) \times \dfrac 12$

5 0

2 years ago