All categories

2 years ago

Help me with the question in the image please help me out :)

Mathematics

1 answer:

Elenna [48]2 years ago

4 0

Step-by-step explanation:

(7 + x) / 3 = 2x - 5

7 + x = 3(2x - 5) (multiply 3 on both sides)

7 + x = 6x - 15 (distributive property)

5x = 22 (arrange like terms)

x = 4.4 (divide 5 on both sides)

You might be interested in

Please solve the question and give correct answer with explanation so that i can understand it

denis-greek [22]

Answer:

Step-by-step explanation:

Let the speed of the car is c and speed of the plane is p.

<h3>We are given:</h3>

The speed of the plane is 7 times the speed of the car

p = 7c

The distance traveled is

d = 315 km

The time difference to travel this same distance is 3 hours.

d = ts, where d- distance, t- time, s - speed

Find the time for car and plane and their difference.

t = d/s = 315/c

<h3 /><h3>Plane</h3>

t = d/s = 315/p = 315/(7c) = 35/c

<h3 /><h3>The difference</h3>

315/c - 45/c = 3

<u>Solve it for c:</u>

(315 - 45)/c = 3
270/c = 3
c = 270/3
c = 90 km/h

Now find the speed of plane:

p = 7c = 7*90 = 630 km/h

As we see, Jenny is right

6 0

1 year ago

A woman prospecting for successful business travels 16km from a point P to a point Q on a bearing of 065°. She then travels to p

SashulF [63]

Answer:

The distance PR is 21.6 Km

Step-by-step explanation:

Please find the attached document for explanation.

Also, I applied Cosine rule to determine the distance PR, since i have an angle (Q) in between two given sides of the triangle.

8 0

2 years ago

In the supermarket a loaf of bread costs 37p how many loaves can david buy with a 2 coin ? How much money will be left over?

Rasek [7]

Answer: He can buy 5 loaves of bread.

After buying 5 loaves 15 p will be left.

Step-by-step explanation:

Given, In the supermarket a loaf of bread costs 37p .

To find: How many loaves can David buy with a $\pounds 2$ coin?

Since $\pounds 1=100\text{ pence}$

Then, $\pounds 2=200\text{ pence}$

Number of loaves he can buy = (Amount he has) ÷ (Cost of a loaf of bread)

= 200 p ÷ 37 p

$=5\dfrac{15}{37}$

i.e. he can buy 5 loaves of bread and 15 p will be left.

Hence, He can buy 5 loaves of bread.

After buying 5 loaves 15 p will be left.

6 0

3 years ago

Kurt earns $6 a week for doing chores. How many weeks will it take him to earn $50 if he has already earned $10 ? Explain how yo

olga2289 [7]

50-10 = 40. 40 divided by 6 = around 6/7. So about 6/7 weeks

5 0

2 years ago

If you got 11/20 on your exam, how much would it be on /100

Serga [27]

Answer:

55/100

Step-by-step explanation:

Multiply 20 by 5 to get 100 so you multiply 11 by 5 to get 55

4 0

2 years ago