The total number of atoms represented by the formula K₂CrO₇ is * 10 28 1 3

Solve the equation - <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bw%7D%7B5%7D" id="TexFormula1" title="\frac{w}{5}" alt="\frac{w}

Tatiana [17]

Answer:

w = -20

Step-by-step explanation:

- $\frac{w}{5}$ + 9 = 13

Shift the (+9) to the other side of the equation. (+9) will turn into (-9).

- $\frac{w}{5}$ = 13 - 9

= 4

Shift the (÷5) to the other side of the equation. (÷5) will turn into (×5).

-w = 4 × 5

= 20

Multiply both sides of the equation by (-1) so that -w will turn into w.

w = (-1) × 20

w = -20

5 0

3 years ago

If f(x)= x^2-2x+3, find the value of f (-2) and f(3)

AlexFokin [52]

Step-by-step explanation:

Given 

f(x) = x² - 2x + 3

Now

f(-2) = (-2)² - 2 * ( -2 ) + 3

 = 4 + 4 + 3

 = 11

f(3) = 3² - 2 * 3 + 3

 = 9 - 6 + 3

 = 12 - 6

 = 6

Hope it helps :)

4 0

3 years ago

when multiplie discount are used if an item is first discount by 40%,then again by 30%.then again by 10%,the final or cumulative

nadezda [96]

The answer is : 40+30=70
70+10=80 therfore the final or cumulative discount is 80%

4 0

3 years ago

Find the gcf of 21 and 30

Vanyuwa [196]

3 is the gcf of 21 and 30

8 0

3 years ago

A rabbit can run at a top speed of 7 2/5 miles in 1/4 hour. What is the unit rate of the top running speed of a rabbit in miles

Aleks [24]

Answer:

The rate of top running speed of rabbit is 29.6 miles per hour

Step-by-step explanation:

Given as :

The speed of rabbit = 7 $\frac{2}{5}$

Or, The speed of rabbit = $\frac{37}{5}$

The time taken by rabbit to cover this speed = $\frac{1}{4}$ hour

∵ In $\frac{1}{4}$ hour , the speed of rabbit is $\frac{37}{5}$

∴ In 1 hour , the speed of rabbit is $\frac{37\times 4}{5\times 1}$ mph

So, in 1 hour, the speed of rabbit is 29.6 mph

Hence The rate of top running speed of rabbit is 29.6 miles per hour Answer

3 0

3 years ago