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
Mnenie [13.5K]
2 years ago
5

PLEASE HELP!!!!!! The length of a rectangle is three times its width. If the perimeter of the rectangle is 56 cm, find its area.

Mathematics
1 answer:
Alexus [3.1K]2 years ago
8 0

Step-by-step explanation:

l = length

w = width

l = 3w

perimeter p = 2l + 2w = 56

using the identity of the first equation

p = 2(3w) + 2w = 56

6w + 2w = 56

8w = 56

w = 7 cm

l = 3w = 3×7 = 21 cm

so, the area is

l×w = 21×7 = 147 cm²

You might be interested in
you pick a card at random without getting the first card back you pick a second card at random what is the probability of pickin
Keith_Richards [23]

We have to calculate the probability of picking a 4 and then a 5 without replacement.

We can express this as the product of the probabilities of two events:

• The probability of picking a 4

,

• The probability of picking a 5, given that a 4 has been retired from the deck.

We have one card in the deck out of fouor cards that is a "4".

Then, the probability of picking a "4" will be:

P(4)=\frac{1}{4}

The probability of picking a "5" will be now equal to one card (the number of 5's in the deck) divided by the number of remaining cards (3 cards):

P(5|4)=\frac{1}{3}

We then calculate the probabilities of this two events happening in sequence as:

\begin{gathered} P(4,5)=P(4)\cdot P(5|4) \\ P(4,5)=\frac{1}{4}\cdot\frac{1}{3}=\frac{1}{12} \end{gathered}

Answer: 1/12

8 0
1 year ago
PLEASE MATH HELP 20 points PLEASE!!!!
blsea [12.9K]
Y = 18( 0.58) ^t

It would be written as :
Y = 18(0.11) ^ (t/4)
Y = 18 (0.11 ^ (1/4)) ^ t
But
0.11 ^ (1/4) = 0.5759

Plug the value

Y = 18 (0.5759) ^ t

Two decimal point :

Y = 18 (0.58) ^ t
7 0
3 years ago
Complete the patterns of the equivalent ratios by filling in the gaps.
gayaneshka [121]
21:3
9:3
3:1

there all a 3:1 ratio
4 0
3 years ago
I really need help plzzzzz
Sonbull [250]

ANSWER

D. rotation, translation, reflection

EXPLANATION

Dilation is not a rigid motion.

When the triangle is dilated the image triangle may become bigger ( magnification) or smaller (reduction).

When the scale factor is negative 1, a congruent triangle is obtained.

Hence dilation will not always produce a congruent triangle.

Rotation, reflection and translation are rigid motions and hence will always produce a congruent triangle.

8 0
3 years ago
At the bakery ratio of cookie sales to donut sales is 4 to 3.Cookies and donuts cost the same amount.If the bakery earned 375.00
Oksanka [162]
3:7 = X:375
375/7 = 53.57
53.57×3 = 160.71
8 0
3 years ago
Other questions:
  • Find the quotient of 2,300 and (0.4 · 10-8). In your final answer, include all of your calculations.
    9·1 answer
  • Please help me with these 2 questions (: thank you~
    13·1 answer
  • If you spend $60 per month on a cell phone plan, how much should you budget each week for that
    6·2 answers
  • Anyone know the answer??
    7·1 answer
  • Please help. Part 2: What is the correct standard form of the equation of the parabola?
    10·1 answer
  • Chang knows one side of a triangle is 13 cm. Which set of two sides is possible for the lengths of the other two sides
    9·1 answer
  • Which can be used to solved the expression (r^-4)^3
    9·1 answer
  • 1. from 24 books to 44 books
    7·1 answer
  • Who can help with this
    15·1 answer
  • (x + 2)*(x^2 -2*x+4) - (x^3 -12)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!