3 years ago

LESSON

Mathematics

1 answer:

bagirrra123 [75]3 years ago

5 0

C is the answer hope that helps have a good day

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Type the correct answer in the box. Round your answer to two decimal places.

Vlad [161]

Find the square root of 13, which is 3.6

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Factor. 2x2 + 4x + 18

Rudiy27

You can't.

It’s already been factored down.

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Margaret drove to a business appointment at 80 mph. Her average speed on the return trip was 70 mph. The return trip took her 1/

Gnoma [55]

Margaret traveled 80 miles to the appointment.

Step-by-step explanation:

Given,

Speed while driving for appointment = 80 mph

Speed while coming back = 70 mph

Let,

x be the time taken for the trip

y be the distance covered

Distance = Speed*Time

y = 80x Eqn 1

Time taken in return trip = x+1/7

y = 70(x+1/7)

$y=70x+10$ Eqn 2

Putting value of y from Eqn 1 in Eqn 2

$80x=70x+10\\80x-70x=10\\10x=10$

Dividing both sides by 10

$\frac{10x}{10}=\frac{10}{10}$

x = 1 hour

Putting x = 1 in Eqn 1

$y=80(1) \\y=80$

Margaret traveled 80 miles to the appointment.

Keywords: linear equation, substitution method

Learn more about substitution method at:

#LearnwithBrainly

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4 years ago

What is the value of 1/2 x^3+3.4y when x=2 and y=5?

lora16 [44]

(1/2) * x^3 + 3.4y when X = 2 and Y = 5.
= (1/2) * (2^3) * 3.4(5)
= (1/2) * 8 * 17
= (1/2) * 136
= 136/2
= 68.

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A surveyor measures the angle of elevation

lisov135 [29]

Check the picture below.

make sure your calculator is in Degree mode.

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