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Hitman42 [59]
3 years ago
15

Alex and Charlene are playing a card game, where each card has a value, he has a total of -16.5 points . What was his cards valu

e before he doubled it .
Mathematics
1 answer:
borishaifa [10]3 years ago
8 0
-8.25 i know this because i divided it by two
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The area of a rectangular glass slab is 80 square centimeters and its perimeter is 36 centimeters. If the length and width of th
netineya [11]

First, you have to find out the values of the length and width.

Let l = length and w = width.

Set up your equation for area: l * w = 80

Set up your equation for perimeter: 2l + 2w = 36

We can use substitution for this problem, so find out the value of l or w. In this case, I will use the first equation to find out the value of l.

(Divide w on both sides) l = 80 / w

Since I know that l = 80 / w, I can substitute it into the second equation.

2l + 2w = 36, and l = 80 / w

= 2 (80/w) + 2w = 36

Simplify the equation.

= 160/w + 2w = 36

Get rid of the w in the denominator by multiplying the entire equation by w.

= ( 160/w + 2w = 36 ) * w

= 160 + 2w^{2} = 36w

= 2 ( w - 8 ) ( w - 10 )

The solutions for width (w) is 8 or 10. Then, you can use both 8 and 10 as your length and width, either or is fine. Multiply by 4 for each of those values and you get 8 x 4 = 32 and 10 x 4 = 40. The new perimeter would be 2(32) + 2(40) =

a. 144 cm

Hope this helped you! Let me know if there are any confusions :)


4 0
3 years ago
2x^3-3x^2+kx-1 is divided (x-1),the remainder is 2 find k
Debora [2.8K]

Answer:

k = 4

Step-by-step explanation:

if f(x) is divided by (x - h) then f(h) is the remainder

f(x) = 2x³ - 3x² + kx - 1

divided by (x - 1) , so h = 1 , then

2(1)³ - 3(1)² + k(1) - 1 = 2

2 - 3 + k - 1 = 2

- 2 + k = 2 ( add 2 to both sides )

k = 4

7 0
2 years ago
Tera buys 10 pencils for $1.99.<br> About how much $ does each pencil<br> cost?
True [87]

Answer:

19 cents or 0.199

Step-by-step explanation:

Hope it helped!

8 0
2 years ago
Read 2 more answers
2.<br> What is the next term of the arithmetic sequence 6, 10, 14, 18, ...?
riadik2000 [5.3K]

Answer:

22

Step-by-step explanation:

In this sequence, the next number is found by adding 4.

4 0
3 years ago
Read 2 more answers
Plz help need to find both answers
saul85 [17]

Answer:

I hope it helped u.

Step-by-step explanation:

7 0
3 years ago
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