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3 years ago

What is the circumference of a. Ircle of a radius 7cm

Mathematics

1 answer:

adoni [48]3 years ago

7 0

The circumference of a circle of a radius of 7cm would be ≈43.98cm

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F(x)=-2x+3 how do you find x if f(x) = 11

NeX [460]

Since we know f(x)=11 all we need to do is substitute and solve. so
11=-2x+3 subtract 3 from both sides
8=-2x divide both sides by -2
-4=x
sub back in to check

-2(-4)+3=8+3=11 looks good

5 0

4 years ago

Prove that lines 3x-4y=12 and 3y=12-4x are perpendicular.

Svetllana [295]

Answer:

see explanation

Step-by-step explanation:

If 2 lines are perpendicular then the product of their slopes equals - 1

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Consider the given equations

3x - 4y = 12 ( subtract 3x from both sides )

- 4y = - 3x + 12 ( divide terms by - 4 )

y = $\frac{3}{4}$ x - 3 ← in slope- intercept form

with slope m = $\frac{3}{4}$

3y = 12 - 4x = - 4x + 12 ( divide terms by 3 )

y = - $\frac{4}{3}$ x + 4 ← in slope- intercept form

with slope m = - $\frac{4}{3}$

Then

$\frac{3}{4}$ × - $\frac{4}{3}$ = - 1

Since the product of their slopes = - 1 then the lines are perpendicular

3 0

3 years ago

What is the measure of each interior angle of the regular polygon pictured below? If necessary, round to the nearest tenth.

sammy [17]

Answer:

144

Step-by-step explanation:

Sum of interior angles:

180(n-2)

180(10-2)

1440

Measure of each interior angle:

1440/10=144

8 0

2 years ago

The product of the reaction between ethanal and ammonia are what.

kenny6666 [7]

Answer:

Step-by-step explanation:

4 0

3 years ago

WILL GIVE A BRAINLIEST PLEASE HELP!!!

kaheart [24]

A(n) = a₁.(r)ⁿ⁻¹, where a₁ = 1st term, r= common ratio and n, the rank

In the formula given a₁ = 5, r = 3/2 and n = 6 (we have to find the 6th term value).

a₆ = 5.(3/2)⁶⁻¹ = 5.(3/2)⁵ = 1215/32 (answer C)

7 0

3 years ago