All categories

3 years ago

U dont have to do the sustem or varibke part, thx

Mathematics

1 answer:

N76 [4]3 years ago

6 0

Answer:

5. Katelyn worked 11 hours at the grocery store.

6. 5pounds of steak

Step-by-step explanation:

5. let x hrs be the no. of hours Katelyn worked at the grocery store.

amnt of money she earnt = 9x + (15-x)×15

= 9x -15x + 225

= -6x + 225

-6x + 225 = 159

6x = 225-159

6x= 66

x= 11

Katelyn worked 11 hours at the grocery store.

6. Let x be the pounds of steak he purchased.

total paid= 13.50x + (8-x)×3.25

= 13.50x -3.25x +26

= 10.25x +26

10.25x+ 26=77.25

10.25x = 77.25-26

10.25x= 51.25

x=5

try using the same method for qn 7 too

You might be interested in

what is the units digit of the sum of 1!+2!+3! ... n! when n=2019. Include an explanation and what a unit digit is.

horsena [70]

Hey!

Finding the factorial for the first few numbers, we have:

1!=1

2!=2

3!=6

4!=24

5!=120

6!=720

7!=720*7

8!=720*56

What we can see as a clear pattern from 5! and on is that our number ends with a 0, making the units digit 0. Therefore, when we add the units digit of 5! and on, we have a result of 0. So, we can simply add the units digits of 1!, 2!, 3!, and 4!, which is 1+2+6+4=13. Since the units digit is the last number, we can drop the tens place to get an answer of 3.

Feel free to ask further questions!

8 0

4 years ago

Someone please help me

iogann1982 [59]

The correct answer is: [B]: " 9.6 cm " .
____________________________________________________________

Explanation:
____________________________________________________________

Let "FH" = "x" ; for which we wish to solve.

45 cm / 12 cm = 36 cm / "x" (in "cm") ;

To solve for "x" ;

Cross--multiply:

Note: Given:

" $\frac{a}{b} = \frac{c}{d}$ " ; " ad = bc " ; (b ≠ 0 ; d ≠ 0) ;

So: " 45x = 12 * 36 " ;

→ 45x = 432 ;

Divide each side of the equation by "45" ;
to isolate "x" on one side of the equation; & to solve for "x" ;

→ 45x / 45 = 432 / 45 ;

→ x = 9.6 cm ;
___________________________________________________________
→ which corresponds with:
___________________________________________________________

→ Answer choice: [B]: " 9.6 cm " .
___________________________________________________________

Hope this answer — and explanation — helps!
Best wishes in your academic pursuits!
___________________________________________________________

8 0

4 years ago

HELP!! CAN I PLEASE GET HELP I JUST NEED WHAT X IS ‍♀️?

nataly862011 [7]

Answer:

x = 2

Step-by-step explanation:

63x - 1 and 62x + 1 are corresponding angles and congruent, thus

63x - 1 = 62x + 1 ( subtract 62x from both sides )

x - 1 = 1 ( add 1 to both sides )

x = 2

7 0