3 years ago

Help me plz thank you

Mathematics

1 answer:

nevsk [136]3 years ago

4 0

Answer:

1) Distance=Speed*time

90=(x+1)*(x)+(2x+5)(x-1)

90=x^2+x+2x^2-2x+5x-5

3x^2+4x-95=0

2) 3x^2+4x-95=0. Using quadratic formula, we get

x=(-4±sqrt(16-4*3*(-95)<u>)</u>)/6, x=5 or - 19/5 but since x also represents time, it can't be negative.

3) Total time take she took for the journey is x+x-1=2x-1=2*5-1=9 hours

You might be interested in

THE AVERAGE DISTANCE FROM THE SUN TO VENUS IS 67,237,910 MILES. THE AVERAGE DISTANCE FROM THE SUN TO EARTH IS 92,955,807. WHICH

Agata [3.3K]

C - the value of 2 in Venus' distance is 1/10 the value of earth's distance.

The 2 in Venus' distance represents 200,000
The 2 in Earth's distance represents 2,000,000

Venus's 2 is 1/10 the value of earth's

4 0

3 years ago

In the interval 0° ≤x≤360°, find the values of x for which sin x=-0.8176. Give your answer to the nearest degree.

Alenkasestr [34]

Answer:

$235, 305, 55$

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

I NEED HELP PLEASEAND STEPS

Ratling [72]

Answer:

2 17/20

Step-by-step explanation:

1 7/10+1 1/2=1 7/10+1 10/20=2 17/20

Please mark as Brainliest! :)

Have a nice day.

6 0

3 years ago

Polygon ABCD has the following vertices: A(−3, 3), B(5, 5), C(5, −4), and D(−3, −4) Calculate the area of the polygon.

aniked [119]

To solve this problem you must apply the proccedure shown below:

1. When you plot the given points, you obtain a trapezoid, therefore, you must apply the formula for calculate the area of a trapezoid, which is:

$A=\frac{(B+b)h}{2}$

Where $B$ is the larger base, $b$ is the smaller base and $h$ is the height.

2. The dimensions are:

$B=9units\\ b=7units\\ h=8units$

3. Substitute values:

$\\A=\frac{(9 units+7units)(8units)}{2} A=64 units^{2}$

The answer is: $64 units^{2}$

6 0

3 years ago

Read 2 more answers

Which of the following is not the same as 5.63 grams? A) 0.563 hg B) 5,630 mg C) 0.00563 hg

Alex787 [66]

<span>B) 5,630
hope it helps
</span>

6 0

3 years ago