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4 years ago

Z--3/4=6 1/2 Help I have homework

2 answers:

8 0

In my opinion, it is easier to use decimals than fractions, so first we are going to rewrite this equation with decimals instead of fraction values.

z - 0.75 = 6.5

To simplify this equation, we are going to add 0.75 to both sides of the equation, to cancel out this value on the left side.

z= 7.25

Your final answer is=7.25 or 7 1/4

GarryVolchara [31]4 years ago

6 0

Two negatives is a positive so the equation is Z+3/4=13/2
-3/4
Z=26/4-3/4
Z=23/4

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In how many ways can Joseph, Michael, Chris, Katherine, Rebecca and Kyle stand in a line?

Andrews [41]

Answer:

720

Step-by-step explanation:

I got it from Quora

We can use 6 people without repetition, which means we simply have to use counting principle 1.

A number of n objects can be arranged in n! ways.

Total number of combinations possibles = 6! =720

6 0

4 years ago

The square of a number decreased by 3 times the number 28 find all possible values for the number

stealth61 [152]

Question:

The square of a number decreased by 3 times the number is 28 find all possible values for the number

Answer:

The possible values of number are 7 and -4

Solution:

Given that the square of a number decreased by 3 times the number is 28

To find: all possible values of number

Let "a" be the unknown number

From given information,

square of a number decreased by 3 times the number = 28

$a^2 - 3a = 28$

$a^2 - 3a - 28 = 0$

Let us solve the above quadratic equation

$\text {For a quadratic equation } a x^{2}+b x+c=0, \text { where } a \neq 0$

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Using the above formula,

$\text { For } a^{2}-3 a-28=0 \text { we have } a=1, b=-3, c=-28$

$\begin{aligned}&a=\frac{-(-3) \pm \sqrt{(-3)^{2}-4(1)(-28)}}{2 \times 1}\\\\&a=\frac{3 \pm \sqrt{9+112}}{2}\\\\&a=\frac{3 \pm \sqrt{121}}{2}=\frac{3 \pm 11}{2}\\\\&a=\frac{3+11}{2} \text { or } a=\frac{3-11}{2}\\\\&a=7 \text { or } a=-4\end{aligned}$

Thus the possible values of number are 7 and -4

5 0

3 years ago

What is 5.43 didided by 15

Nookie1986 [14]

Divided

5.43÷15=0.362

5 0

4 years ago

Read 2 more answers

If i= square root of -1, what is the value of i 3?

Furkat [3]

If i = √-1 ,

then ...

i² = (√-1)² = -1

i³ = - √-1 = -i <== the answer to the question

i⁴ = (i²) · (i²) = (-1) · (-1) = 1

and then the whole thing starts over again, for higher powers of i .

6 0

4 years ago

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Ali salary is increased from 2600 to 3000 . How much is percentage increase

nadezda [96]

Answer:

15.3 %

Step-by-step explanation:

400 / 2600 x 100 = 15.3 %

I hope im right!!

8 0

3 years ago

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