MATHEMATICS HIGH SCHOOL

40 cm ___ 4 m

A : >
B : <
C : =

Answers

Answer 1
Answer: B: < 
4 m = 400 cm
so 40cm is smaller than 400cm
Answer 2
Answer:

Answer:

B

Step-by-step explanation:

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One of the heaviest rainfalls ever recorded occurred in Holt, Missouri, when 12 inches of rain fell in 40 minutes. At this rate, how much rain would fall in an hour?

Answers

18 inches would fall in an hour

5x+10=24-2x what is this called?

Answers

This is a one variable equation in algebra.

X = 2
5x+2x=24-10
7x=14
x=14\7=2
 this is a linear equation.
I hope this helps you!

Find an exact value cos(19pi/12)

Answers

cos\left ( (9\pi)/(12)\right )=\frac{\sqrt{2-√(3)}}{2}

Step-by-step explanation:

We know that

          cos 2x = 2cos²x - 1

So we have

          cosx=\sqrt{(1+cos2x)/(2)}

Substituting x=(19\pi)/(12)

         cos\left ( (19\pi)/(12)\right )=\sqrt{(1+cos2\left ( (19\pi)/(12)\right ))/(2)}\n\ncos\left ( (19\pi)/(12)\right )=\sqrt{(1+cos\left ( (19\pi)/(6)\right ))/(2)}\n\ncos\left ( (9\pi)/(12)\right )=\sqrt{(1+cos570)/(2)}\n\ncos\left ( (9\pi)/(12)\right )=\sqrt{(1-(√(3))/(2))/(2)}\n\ncos\left ( (9\pi)/(12)\right )=\sqrt{(2-√(3))/(4)}\n\ncos\left ( (9\pi)/(12)\right )=\frac{\sqrt{2-√(3)}}{2}

   cos\left ( (9\pi)/(12)\right )=\frac{\sqrt{2-√(3)}}{2}
19 π / 12 = 19 * 180° / 12 = 285 °
cos ( 19 π / 12 ) = cos 285° = cos ( - 75° ) = cos 75°
cos 75° = cos ( 45° + 30° ) = cos 45° cos 30° - sin 45° sin 30° =
= ( √2 / 2 · √3/2 ) - ( √2 / 2 · 1/2 ) = √6/4  - √2/4 =
= ( √6 - √2 )/ 4

How do you do this.?

Answers

ok so
parabola standard form is
y=ax^2+bx+c

if you have the points
(-2,18)
(0,4)
(4,24)

sub points to find a,b and c

(-2,18)
sub -2 for x and sub 18 for y
18=a(-2)^2+b(-2)+c
18=4a-2b+c

(0,4)
sub 0 for x, nice a, an b cancel
4=a(0)^2+b(0)+c
4=0+0+c
4=c
we can sub that back later

(4,24)
24=a(4)^2+b(4)+c
24=16a+4b+c

we have

18=4a-2b+c
c=4
24=16a+4b+c
sub 4 for c

18=4a-2b+4
24=16a+4b+4
minus 4 from both sides

14=4a-2b
20=16a+4b
simlify all equations
7=2a-b
5=4a+b
add to solve for 6a
12=6a+0b
12=6a
divide both sides by 6
2=a

sub back
7=2a-b
7=2(2)-b
7=4-b
-3=b

equation is
y=2x^2-3x+4

Is relation t a function? Is the inverse of relations t a function? Relation t x 0 1 2 3
y -2 1 10 2

Answers

Relation t is a function because it has no repeating x values

the inverse of relation t is when u switch the x and y values.
ex. inverse of (0,-2) is (-2,0).

and yes, the inverse of relation t is also a function because there are no repeating x values.

Please help with this 17 points

Answers

Answer:

x represents the amount of burgers you order at a restaurant and they each cost $5 y represents your total in cost of $ so if you get 3 burgers for 5 dollars each y= $15

Step-by-step explanation:
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