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3 years ago

Help!?!! interval on graphs?!

Mathematics

2 answers:

jeka943 years ago

6 0

I want to say that shows a decreasing interval, since it is going downwards.

lbvjy [14]3 years ago

4 0

I will say decreasing sorry if I’m wrong.

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A rectangle has a length of 14 yards less than 9 times its width. If the area of the rectangle is 6183 square yards, find the le

Jlenok [28]

Answer:

$l=238\ yards$

Step-by-step explanation:

From the question we are told that:

Area of Rectangle A=6183

Equation of Length

$l=9w-14$

Where

$w=width\ of\ triangle$

Generally the equation for Area of Rectangle is mathematically given by

$A=(9w-14)w$

$A=9w^2-14w$

$6183=9w^2-14w$

$9w^2-14w-6183=0$

$w=28$

Therefore

$l=9(28)-14$

$l=238\ yards$

4 0

3 years ago

the sum of the ages of Petra and her mother is 45. her mothers is 6 years more than twice as old as Petra. how old are Petra and

otez555 [7]

Petra is 13 and her mother is 32. I used this equation:
$p + 2p + 6 = 45$
if you solve for p, you get 13. 13 times 2 plus 6 equals 32. So her mother is 32.

4 0

3 years ago

Solve using the quadratic formula 2x^2 + 7x - 15 = 0

marissa [1.9K]

Answer:

1.5 or -5

Step-by-step explanation:

2x²+7x-15=0

Divide by 2:

x²+7x/2-15/2=0

x=-7/2/2 ± √49/4(4)+15/2

=-7/4 ± √49/16+120/16

=-7/4± √169/16=-7/4 ±13/4

=6/4 or -20/4

=1.5 or -5

3 0

3 years ago

Kelli works at a department store that sells shoes. She receives an employee discount for any shoes she buys at the store. If je

Irina-Kira [14]

30% off
your welcome ;D two week old question tho
thats rare

8 0

3 years ago

The following graph represents the distance a commercial airplane travels over time, at cruising speed and an altitude of 35,000

ANEK [815]

Answer:

see the explanation

Step-by-step explanation:

The picture of the question in the attached figure

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Let

x ----> the time in hours

y ----> the distance in miles

Find the value of k

For the point (4,2268)

$k=\frac{2,268}{4}=567\ mph$

The slope represent the speed of the airplane

The linear equation is

$y=567x$

Part 1 :

The point (0,0) represents the starting point of the aircraft, when the time and distance are equal to zero. The cruising starts when time t = 0.

Part 2 :

The point (4, 2268) represents the plane after 4 hours of cruise , and shows it has traveled a distance of 2268 miles after 4 hours

3 0

4 years ago