1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SVETLANKA909090 [29]
3 years ago
7

The area of a rectangle is 42 m2, and the length is

Mathematics
1 answer:
MrRissso [65]3 years ago
6 0

Answer:

length = 14 m

width = 7 m

Step-by-step explanation:

l = length

w = width

l = 2w - 8

w(2w - 8) = 42

2w² - 8w - 42 = 0

you can factor out a 2 to work with smaller numbers:

w² - 4w - 21 = 0

(w - 7)(w + 3) = 0

w = 7

'w' cannot equal a negative so we discount it as an answer

find length:

l = 2(7) - 8

l = 14 - 8 or 6m

You might be interested in
Sorry if it blurry but if you can see it plz help
RoseWind [281]
Y=-3/4x+8 is the answer
8 0
3 years ago
Ted says that 7 tenths multiplied by 10 equals 70 hundredths. Is he correct? Use a place value chart to explain your answers
shutvik [7]
No he isn't..
. 7×10=7
for each time it's multiplied by ten, the decimal point goes back one.
3 0
3 years ago
Find the value of k so that the
BaLLatris [955]

Answer:

gradient =  - 3 \\  - 3 =  \frac{(8 + 1)}{( - 2 - k)}  \\  3(2 + k) = 9 \\ 2 + k = 3 \\ k = 1

8 0
3 years ago
Production output paid a seamstress .5 every 4 pockets sewed how many pockets she have to sew for $60.00
Sphinxa [80]
The seamstress would have to sew 15 pockets for $60. Just divide 60.00 by 4.
5 0
3 years ago
3х – 8y = 19<br> 3х + 5y = — 46
Vadim26 [7]

Answer:

-5

Step-by-step explanation:

multiple the second equation by negative then subtract or add the equations and the answer will be negative 5

4 0
2 years ago
Other questions:
  • Write 7:30 in two ways
    11·2 answers
  • How can you estimate 1506 divided by 2so that it is close to the actual answer
    8·2 answers
  • Explain why 3(x+4)=3(x-5) has no solution. Choose the best response below.
    5·2 answers
  • The probability that Paula passes Mathematics is 2/3, and the probability that she passes English is 4/9. If the probability tha
    14·1 answer
  • Karma was given some birthday money. She puts the money in an account. Every month after that, she deposits the same amount of m
    6·2 answers
  • A telemarketer will make 25 calls in one hour. the probability of making a sale on any given call is .09. what is the probabilit
    8·1 answer
  • p + 7 = 12 Subtract 7 from both sides of the equation. Subtract 7 from 7. 7 – 7 = 0 and 12 – 7 = 5, so p = 5. Substitute 12 for
    8·1 answer
  • Express the repeating decimal 2.1¯ as a fraction.<br> 21/10<br> 20/9<br> 19/9<br> 19/8
    7·2 answers
  • A box containing a present is shown.
    10·2 answers
  • find the coordinates for the center of a circle with a diameter having endpoints at (0,2) and (-9,-2)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!