![nooope](/avatars/15791.jpg)
nooope
01.06.2021 •
Mathematics
Please use system of linear equations by elimination OR substitution. I need the work as well please.
Solved
Show answers
More tips
- F Food and Cooking The Disease That Haunted Abraham Lincoln...
- P Philosophy What is Something for you?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
- F Food and Cooking How to Properly Cook Buckwheat?...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
Answers on questions: Mathematics
- M Mathematics Play Help :find the missing number that makes the equation true...
- M Mathematics How many nails did they make on wednesday? Please Figure this out ASAP!!!...
- M Mathematics I need help with this problem...
- M Mathematics 14 ÷ 4032I m very bad at Division...
- M Mathematics How do you graph. Polynomial . F(x) =(x+3)(x-2) (x-1)...
- M Mathematics Please help me quick...
- M Mathematics The base of a pyramid is a rectangle whose base and height are 9m and 4m. The volume is 120. What is the height? (plz give description on how to find the answer, if you can)...
- M Mathematics Ms. Salta buys buffalo wings for a party. If there are 3 servings per buffalo pound, exactly how many servings does she have for 25 pounds....
- M Mathematics Me ayudan porfavor les agradeceria mucho...
- M Mathematics Colton read 27 pages in 1 1/5 hours. At what rate, in pages per hour, did he read?...
Ответ:
1) P= 64 cm, width = x, length = 14 + x
64 = x + x + 14 + x + 14 + x
64 = 4x + 28
4x = 64 - 28
4x = 36
x = 36/ 4
x = 9
AREA = 9 x (9+14)
Area = 9 x 23
Area = 207 cm
2) smaller no. = y, bigger no. = x
x - y = 3
2x+1/2y=36
Next, multiply 2 to first equation and find y:
2x-2y=6
5/2y=30
y = 12
Substitue y to x-y=3 to find x,
x = 15
3) x = pencil, y = pen
5x + 4y = $6.15
8x + 3y = 9.85$
8x + 7y = ?
5x + 4y = 6.15$ multiply both sides by -3
8x + 3y = 9.85$ multiply both sides by 4
-15x + 32x = (-3)*6.15 + 4*9.85
7x = 19.87 multiply both sides by 8/7
8x = (8/7) x 19.87
Add both equations:
32y - 15y = 8x6.15 - 5*9.58
17y = 1.3
y = 91/17) x 1.3
7y = (7/17)x 1.3
8x + 7y = (8/7) x 19.87 + (7/17) x 1.3
8x + 7y = $23.244
4) 2l + 2w = 0
2 x 2l + 2 x 1/2w = 40 + 16
l+w = 20
4l+w = 56
I’ve got l = 12 and w = 8
5) 28.56 feet (approx)
step-by-step explanation:
since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.
we have to find out the measurement of segment ab.
therefore, tan 55° = \frac{ab}{bc}
but bc = 20 feet.
⇒ tan 55 ° = \frac{ab}{20}
⇒ ab = 20 × tan 55 °
⇒ ab = 20 × 1.42814800674
⇒ ab = 28.5629601348 ≈ 28.56 feet
6) The answer is teh attachment !
7) 3x-x+2=4
HOPE THE ANSWERS HELP!! PL MARK ME BRAINLIEST!
Ответ:
(−4, 10)
Step-by-step explanation:
If M is the midpoint of AB, then ...
M = (A + B)/2
2M = A + B . . . . . . multiply by 2
2M -A = B . . . . . . . subtract A
2(-1, 8) -(2, 6) = (-2-2, 16-6) = (-4, 10)
It can be worthwhile to remember how to get the endpoint from the other end and the midpoint: B = 2M - A.