What is the solution of 3x+5=2x-7

Mathematics

1 answer:

Vesnalui [34]3 years ago

4 0

I think that it is B

You might be interested in

Geometry<br> Solve for x. Round to the nearest tenth, if necessary.<br> Bottom letter is F

german

Answer:

1. $x \approx 229.8$

2. $x \approx 2.6$

Step-by-step explanation:

1. We can use the following trigonometric ratio since we are given the adjacent side and need to find the hypotenuse from the angle:

$cos(x) = \frac{adjacent}{hypotenuse}\\cos(72) = \frac{71}{x}\\x = \frac{71}{cos(72)}\\x \approx 229.8$

2. We can use the following trigonometric ratio since we are given the adjacent side and need to find the opposite from the angle:

$tan(x) = \frac{opposite}{adjacent}\\tan(43) = \frac{x}{2.8}\\x = tan(43) \times 2.8\\x \approx 2.6$

8 0

2 years ago

An exterior angle measure of a regular polygon is given. Find the number of its sides and the measure of each interior angle. 40

erica [24]

Sum of all exterior angles = 360°.

Number of sides = 360 ÷ 40 = 9

Each interior angle = 180 - 40 = 140°.

Answer: <span>The regular polygon has 9 sides and each of its interior angles 140°</span>

7 0

3 years ago

Read 2 more answers

Heloïse considered two types of printers for her office. Each printer needs some time to warm up before it starts printing at a

slava [35]

Answer:

1) a, the first printer

2) b, the second printer

Step-by-step explanation:

7 0

3 years ago

it takes 30 kids 6 hours to build a man sized Sand Castle. how many kids were there if the same game took only two-and-a-half ho

Pachacha [2.7K]

Answer:

There were 72 kids there.

Step-by-step explanation:

This question can be solved using proportions, by a rule of three.

The number of kids and time are inversely proportional, that is, if we increase the number of kids to build the castle, the time it takes will decrease. This means that to solve the rule of three, instead of applying cross multiplication, we apply line multiplication.

We have that:

30 kids - 6 hours

x kids - 2.5 hours.

Applying line multiplication

$2.5x = 30*6$