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
sweet [91]
3 years ago
14

A parallelogram has base (2x - 1) metres and height (4x - 7) metres.

Mathematics
1 answer:
Jobisdone [24]3 years ago
4 0

Answer:

0.4069 ; 1.843

Step-by-step explanation:

Given:

Base of parallelogram, b = (2x - 1)

Height = (4x - 7)

Area = 1

Area of parallelogram = Base * height

Area of parallelogram = (2x - 1) * (4x - 7)

(2x - 1) * (4x - 7) = 1

8x² - 14x - 4x + 7 = 1

8x² - 18x + 7 - 1 = 0

8x² - 18x + 6 = 0

Divide through by 2

4x² - 9x + 3 = 0

Solving the quadratic equation :

Using the formula

-b ± √(b² - 4ac) / 2a

a = 4 ; b = - 9 ; c = 3

Plugging in the values :

-(-9) ± √((-9)² - 4(4)(3)) / 2(4)

9 ± √(81 - 48) / 8

9 ± √33 / 8

(9 ± 5.7445626) / 8

(9 - 5.7445626) / 8) = 0.4069

(9 + 5.7445626) / 8 = 1.843

You might be interested in
How to find an equation for a line through two given points?​
xz_007 [3.2K]

Answer:

The equation of the line is: y = 0.6x + 0.6

Step-by-step explanation:

Equation of a line:

The equation of a line has the following format:

y = mx + b

In which m is the slope and b is the y-intercept.

Two points:

We have these following two points in this exercise:

x = -6, y = -3, so (-6,-3)

x = 4, y = 3, so (4,3)

Finding the slope:

Given two points, the slope is given by the change in y divided by the change in x.

Change in y: 3 - (-3) = 3 + 3 = 6

Change in x: 4 - (-6) = 4 + 6 = 10

So

m = \frac{6}{10} = 0.6

Then

y = 0.6x + b

Finding b:

We replace one of the points in the equation to find b. I will use (4,3).

y = 0.6x + b

3 = 0.6*4 + b

2.4 + b = 3

b = 0.6

The equation of the line is: y = 0.6x + 0.6

4 0
2 years ago
Evaluate-2x3 - 2x2 - 4x-2 for x=-2.<br> A.-18<br> B. 16<br> C. -2<br> D. 14
dmitriy555 [2]

Answer:

14

Step-by-step explanation:

-2x^3 - 2x^2 - 4x-2

Let x = -2

-2 (-2)^3 - 2 (-2)^2 -4(-2) -2

Exponents first

-2 (-8) -2 (4) -4(-2) -2

Then multiply

16 -8 +8 -2

Then add and subtract

14

4 0
2 years ago
The ratio of Victors money to Susies money is 4:7 at first. After Victor spent half of his money and Susie spent $60, Susie had
valkas [14]

Answer:

Victor originally had $80

Step-by-step explanation:

Let Victor have $4x

Let Susie have $7x

Since Victor spent half his money, he now has $2x

Susie spent $60 and thus now has $(7x - 60)

The final ratio of Victor's money to Susie's money is therefore  2x : $(7x - 60). This is given 1:2. Now we just need to solve the proportion by cross-multiplying

2x : (7x - 60) = 1:2

1 × (7x - 60) = 2 × 2x

7x - 60 = 4x

3x = 60

x = 20

Therefore Victor originally had $4x = $80.

7 0
1 year ago
Read 2 more answers
Is <img src="https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B27%7D" id="TexFormula1" title="\sqrt[3]{27}" alt="\sqrt[3]{27}" align="abs
velikii [3]
Irrational !! a rational number is a number such as -3/7 that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q.
6 0
3 years ago
Read 2 more answers
WILL GIVE BRAINLIEST! PLEASE HELP ASAP!
aleksandr82 [10.1K]

Answer:

11

Step-by-step explanation:

Evaluate using

PEMDAS

First we do what is inside of the Parenthesis 12 - 9 = 3

Now we have 2 + 3²

Next is Exponents 3² = 9

Now we have 2 + 9

there is no multiplication or division needed so we go straight to addition

9 + 2 = 11

So we can conclude that the answer is 11

4 0
2 years ago
Read 2 more answers
Other questions:
  • Is this true or false?
    11·2 answers
  • Choose all the statements that are true about this sequence.
    14·1 answer
  • What is the value of x? sin(x+34)°=cos(2x+20)° Enter your answer in the box. x =
    7·1 answer
  • John bought a used truck for $4,500. He made an agreement with the dealer to put $1,500 down and make payments of $350 for the n
    7·1 answer
  • Variables x and y are in direct proportion, and y = 48n when x = 16n. Which value of k correctly relates x and y in the equation
    14·1 answer
  • Ok last one for today that I cant figure out <br> (6c - 4) - ( c - 3) c = -7 Ty!
    9·1 answer
  • Solve for x. Round to the nearest tenth, if necessary.
    11·1 answer
  • I am having troubles solving this 4(x+3)=x+42 can i get some help please.
    9·2 answers
  • Chantal has 456 pennies. She puts 36 pennies in each jar. How many jars does Chantal fill? How many pennies are left over?
    6·2 answers
  • The first side of a triangle is 7 ft more than the third side. The second side is 1 ft shorter than 3 times
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!