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2 years ago

Pierre's unicycle wheel has a diameter of 80 cm.

Mathematics

1 answer:

mina [271]2 years ago

8 0

Answer:

a) 251.33 cm

b) 40 times

Step-by-step explanation:

C = d x r

a) C = 80 cm x 3.14 = 251.33 cm

b) 100 m = 10,000 cm

10,000cm/251.33cm = 40 times

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What is the measure of angle A?

antoniya [11.8K]

Answer:

A = 19.47

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin theta = opp / hypotenuse

sin A = 2/6

Take the inverse sin of each side

sin ^-1 ( sin A) = sin ^-1 (2/6)

A =19.47122063

To the nearest hundredth

A = 19.47

3 0

3 years ago

Solve for x: (x+4) = 7.(1 point) 2 Ox=3 Ox=5 Ox=6 O x = 10

MArishka [77]

Answer:

Step-by-step explanation:

So we have the equation:

$x+4=7$

To solve for x, subtract 4 from both sides:

$(x+4)-4=(7)-4$

The left side cancels. Subtract on the right:

$x=3$

So, the value of x is 3.

And our answer is A.

And we're done!

5 0

3 years ago

The cost of 7 chairs and 2 tables is equal.If the cost of 6 chairs and 5 tables is 10575, find the cost of 12 chairs.

Igoryamba

Answer:

5400

Step-by-step explanation:

Let x represent the cost of a chair and y represent the cost of a table. We can use this to set up a system of equations:

7x=2y

6x+5y=10575

We can solve this system using substitution.

Start by rewriting the first equation in terms of x.

$7x=2y\\\text{Divide both sides by 7}\\x=\frac{2}{7}y$

Substitute this into the second equation:

$6(\frac{2}{7}y)+5y=10575\\\frac{12}{7}y+5y+10575\\\frac{12}{7}y+\frac{35}{7}y=10575\\\frac{47}{7}y=10575$

Multiply both sides by 7

$47y=74025$

Divide both sides by 47

$y=1575$

This means...

$7x=2(1575)\\7x=3150$

Divide both sides by 7

$x=450$

One chair costs 450. Now, multiply this number by 12 to find the cost of 12 chairs.

$450*12=5400$

12 chairs cost 5400.

7 0

2 years ago

Anyone know how to factor this: x^3 -3x^2 -10x=0

Kazeer [188]

Answer : x = 0,5,-2
Step 1 : factor left side
x(x+2)(x-5)=0
step 2 : set factors equal to 0
x=0, x+2=0 or, x-5=0

6 0

2 years ago

Can someone solve 2x-3y=9 and give me the slope and y intercept SHOW WORK please

Dominik [7]

Answer:

The slope is 2/3 and the y-intercept is -3

Step-by-step explanation:

First you subtract 2/3 from both sides and get -3y=-2x+9. Then you divide -3 by -2 and -3 by 9 to get y=2/3-3.

Hope this helped I am not good at explaining but I did this unit like two months ago.

4 0

2 years ago