A rectangle has length (x-3) cm and width 4 cm. The perimeter of the rectangle is 40 cm. Find the length.

Answers

Answer 1

Answer: we actually don't need to solve for x, just legnth

P=2(L+W)
40=P
L=x-3=L (since we are solving for Legnth not specifically x)
W=4

40=2(L+4)
divide both sides by 2
20=L+4
minus 4 both sides
16=L

legnth=16 cm (x=19 just fyi)

Answer 2

Answer: 2(x-3)+2(4)=40
2x-6+8=40
2x+2=40
2x=38
x=19
Length=(x-3)=(19-3)=16 cm

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Term insurance has value as an investment. True or false ?

Answers

the answer to does the term insurance have a value as an investment. the answer is true

The answer is true, It does have a value as an investment.

Is 7 divided by 8 equal to, greater then, or less then 3 divided by 4

Answers

7 divided my 8 is greater than 3 divided by 4

A rectangle is three times as long as it is wide. If the total area of the rectangle is 48 square inches, what is the length of the rectangle?

Answers

Hey Inderpreet!

To find the area of a rectangle, you must multiply the length by the width.
A= L*w, L= 3w
A=3w*w
48 = 3w*w
48=3w^2
48/3 = w^2
16= w^2
squareroot of 16 = w
w= 4
plug 4 back in the equation of L= 3w
3(4) = 12
If the Area is equal to 48, and the length is three times the width, then the length must be equal to 12 inches, while the width is equal to 4.

Hope this helps!

Two perpendicular lines intersect at the origin. If the slope of the first line is 3, what is the equation of the second line?.

Answers

The slope of the line perpendicular to a line with a given slope is its negative reciprocal. Hence, the new slope is -1/3. The equation of the line given slope and point can be generally expressed as,
y - y1 = m(x - x1)
Substituting,
y - 0 = (-1/3)(x - 0)
The final equation would be,
x + 3y = 0

if slope of first line is 3 and is perpendicular to second line
then second line has a slope of -1/3

ohn and 3 friends are going out for pizza for lunch. They split one pizza and 4 large drinks. The pizza cost $13.00. After using a $6.00 gift certificate, they spend a total of $13.20. Write an equation to model this situation, and find the cost of one large drink.

Answers

4 large drinks
The pizza cost $13.00
$6.00 gift certificate
d= cost of one drink

equation
4d + 13 - 6 = 13.20
4d + 7 = 13.2
4d = 6.2
d = 1.55

answer
the cost of one large drink is $1.55

Find the missing length.С
9
c= /[?]
TX
Pythagorean Theorem: a2 + b2 = c2
3

Don’t mind the broken laptop

Answers

Answer:

c = $√(90)$

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse c is equal to the sum of the squares on the other 2 sides, that is

c² = 9² + 3² = 81 + 9 = 90 ( take the square root of both sides )

c = $√(90)$

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