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2 years ago

Convert r= 2 / 7sinθ−cosθ to rectangular form.

Mathematics

2 answers:

fomenos2 years ago

4 0

Answer: If u want to know what 2/7 = this is the answer.. 0.285714

Step-by-step explanation:

i think i can answer that but i don't understand sinθ-cosθ what is that and what does it mean pls give me info on what this is so i can help u with this question.

also be safe! have a great day :)

Nataly [62]2 years ago

4 0

ANSWER:

x = rcosθ, y = rsinθ

Then,

cosθ = x/r and sinθ = y/r

Plug in values for cos and sin in the equation and we are done.

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PLSS HELP ME!!! question 3x - 4/5= - 1/2 what is the value of x?

Minchanka [31]

Answer:

x = $\frac{1}{10}$

Step-by-step explanation:

Given

3x - $\frac{4}{5}$ = - $\frac{1}{2}$

Multiply through by 10, the lcm of 5 and 2 to clear the fractions

30x - 8 = - 5 ( add 8 to both sides )

30x = 3 ( divide both sides by 30 )

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3 years ago

Identifying a constant of variation question R= ?

jek_recluse [69]

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$P= \frac{R}{V}$

We can also write it as:

$PV=R$

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2 years ago

The ratio of boys to girls in a group is 4:1. If there are 33 more boys than girls, work out how many people there are in total.

MissTica

Total number of people is 55

Step-by-step explanation:

Step 1:

Given ratio between boys and girls is 4:1. Let number of girls be x, so number of boys = 33 + x

⇒ 4x + x = x + 33 + x

⇒ 5x = 33 + 2x

⇒ 3x = 33

⇒ x = 11

Step 2:

Find total number of people.

33 + 2x = 33 + 22 = 55

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2 years ago

Read 2 more answers

What is a equivalent rational number to 1.28 repeating?

goblinko [34]

the line over the 28 means the 28 repeats forever. 1.282828.... and so on let x be the rational number 1.28... we can use this trick: 100*1.282828....= 128.282828... (the decimal 28 part repeats) 100x = 128.28... next: 100x - x = 128.282828... - 1.282828... the .282828... part will be subtracted away 99x = 127 divide both sides by 99 to get x= 127/99

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2 years ago

I need help asap plz!!!

svet-max [94.6K]

Answer:

AC ≈ 10.3

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan48° = $\frac{opposite}{adjacent}$ = $\frac{AC}{AB}$ = $\frac{AC}{9.3}$ ( multiply both sides by 9.3 )