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
mart [117]
3 years ago
8

SOLVE APPLICATION USING ALGEBRA. TYPE THE EQUATION OR INEQUALITY AND PLEASE SHOW WORK. a) A rectangle with perimeter 18 cm has l

ength that is 3 cm more than twice its width. Find the dimensions of the rectangle.
Mathematics
2 answers:
alekssr [168]3 years ago
4 0

Answer:

w=2\\l=7

Step-by-step explanation:

l+l+w+w=18\\\\2w+3=l\\\\2w+3+2w+3+w+w=18\\6w+6=18\\6w=12\\w=2\\\\2w+3=l\\2*2+3=l\\4+3=l\\l=7

elixir [45]3 years ago
3 0

Answer:

3 cm by 6 cm

Step-by-step explanation:

Represent the length and width by L and W.  

The perimeter is P = 2L + 2W, and here the perimeter is 18 cm.

Finally, L = W + 3 cm.  substituting W + 3 cm for L in the above equation, we get:

18 cm = 2(W + 3) + 2W, or (after reduction)

9 cm = W + 3 cm + W

Then 2W = 6 cm, or W = 3 cm.

Then the length is L = W + 3, or 3 cm + 3cm = 6 cm

The dimensions of the rectangle are 3 cm by 6 cm.

Check:  Does 2(3 cm) + 2(6 cm) = 18 cm?  Yes

You might be interested in
Find the value of c that makes the trinomial a perfect square trinomial.<br> m^2-14m+c
Pie

Answer:

49

Step-by-step explanation:

m^2-14m+c

Take the -14

Divide by 2

-14/2 = -7

Square it

(-7)^2 = 49

Add it to each side

m^2-14m+49

The value of c is 49

6 0
3 years ago
What is equivalent to 9/7 ?
NeTakaya

Answer:

1.28571428571

Step-by-step explanation:

9/7+1.2 in all

5 0
3 years ago
Read 2 more answers
Which shows the correct substitution of the values a, b, and c from the equation 1 = -2x + 3x2 + 1 into the quadratic
lidiya [134]

Answer: A

Step-by-step explanation:

The first thing we need to do is to make sure our equation is in standard form. The given equation is not in standard form.

3x²-2x=0

Now that the equation is in standard form, we can find our A, B, C to see which quadratic equation is correct.

A=3

B=-2

C=0

We can automatically eliminate D because the first value is -3 when it is supposed to be -(-2). Also, the denominator is supposed to be 2a. We know that A=3. The denominator should be 2(3), not 2(-2).

Next, we can eliminate B and C. For the 4ac, we know it has to be 4(3)(0) because A=3 and C=0. B and C have given 4(3)(2) and 4(3)(1), respectively. This does not match A=3 and C=0.

Therefore, A is the correct answer.

4 0
3 years ago
Please Help ASAP!!! Its My Pre Algebra Exam!
const2013 [10]

Answer:

The brainly terms of service states that you can not use Brainly for tests or exams. Please do not do this.

Step-by-step explanation:

6 0
2 years ago
Please help me graph and find the slope. I need an answer ASAP will mark brainliest!
Xelga [282]

Answer:

y = 0.6x

Step-by-step explanation:

Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Slope-Intercept Form: y = mx + b

Step 1: Find slope <em>m</em>

m = (1.2 - 0)/(2 - 0)

m = 1.2/2

m = 0.6

y = 0.6x

Step 2: Find y-intercept <em>b</em>

(0, 0) is y-int

Equation is y = 0.6x

Step 3: Graph

Use point (-5, -3) and (0, 0) to graph

6 0
2 years ago
Other questions:
  • Solve:<br> (x+10) - (x-1)
    9·1 answer
  • What is the perimeter of rhombus WXYZ?<br><br> units<br> 12 units<br> units<br> 20 units
    12·1 answer
  • Problem -
    5·2 answers
  • PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!<br><br> Divide.
    7·1 answer
  • Which is equivalent to 3log28 + 4log212 − log32?
    13·1 answer
  • How to I rewrite 3a+6b=d in terms of b and d
    9·1 answer
  • How would i graph y=2/3x+1
    14·2 answers
  • HELP HURRRYYY!!!! If (72)x = 1, what is the value of x? Explain your answer.
    15·2 answers
  • Lisa makes $78.37 per day. If she works 8 12<br> hours, how much does she make in 1 hour?
    11·1 answer
  • Area of parts of circles
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!