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2 years ago

What is the formula for a counterclockwise rotation of 180°?!?!

2 answers:

7 0

Answer: A (x,y) is your original. Your answer after would be A' (-x,-y) you would change the sign. If its negative it becomes positive, and if it'd positive it becomes negative.

siniylev [52]2 years ago

3 0

Answer: you change both signs to the opposite

Step-by-step explanation:

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Starting with 195 grams of a radioactive isotope, how much will be left after 3 half-lives?

MrMuchimi

After one half-life: $\frac{1}{2}\times 195=97.5$ grams.

After two half-lives: $\frac{1}{2} \times 97.5=48.75$ grams.

After three half-lives: $\frac{1}{2} \times 48.75=24.375$ grams.

4 0

2 years ago

If cos θ = .62 and if 0<θ<90 what is the approximate value of sin θ to the nearest hundredth

Deffense [45]

$\cos\Theta=0.62\\\\\text{Use:}\ \sin^2\alpha+\cos^2\alpha=1\\\\\sin^2\Theta+(0.62)^2=1\\\\\sin^2\Theta+0.3844=1\ \ \ |-0.3844\\\\\sin^2\Theta=0.6156\to\sin\Theta=\pm\sqrt{0.6156}\\\\\sin\Theta_1\approx-0.78\ \vee\ \sin\Theta\approx0.78\\\\\Theta\in(0^o;\ 90^o),\ therefore\ \sin\Theta \ \textgreater \ 0\to\boxed{\sin\Theta\approx0.78}$

5 0

2 years ago

4x + 2y = -12 3x + y = -10 please help system by substitution.

padilas [110]

Answer:

(-4, 2)

Step-by-step explanation:

4x+2y=-12

3x+y=-10

Start by dividing the first equation by 2 to simplify it...

2x+y=-6

Then, subtract -2x from both sides to isolate y...

y=-2x-6

Substitute -2x-6 for y in the second equation...

3x-2x-6=-10

Combine like terms...

x-6=-10

Add 6 to both sides

x-6+6=-10+6

x=-4

Plug -4 in for x to solve for y:

3(-4)+y=-10

-12+y=-10

Add 12 to both sides

-12+12+y=-10+12

y=2

(x,y)=(-4,2)

3 0

2 years ago

matthew scored a total of 168 points in basketball this season. He scored 147 of those points what perenct of his total points d

natka813 [3]

88% not sure but I think so if it’s not the answer I’m sorry.

7 0

2 years ago

ing needs 3 cups of milk to make 30 cookies. How many ounces of milk would he need to make 120 cookies?

Llana [10]

Answer:

12 cup of milk.

Step-by-step explanation:

if 3 cups of milk can make 30 cookies it means 1 cup of milk can make 10 cookies then for 100 cookies we need 10 cup of milk and 30 more means 3 more so answer is 12

8 0

2 years ago