MATHEMATICS HIGH SCHOOL

15 points any help would be appreciated

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

this is what i think it might not be right but i tried my best ;3

can i please have brainly

Answer 2

Answer:

Answer:

1, 4, 6 those are correct

Step-by-step explanation:

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If two lines are perpendicular, then they form:

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If two lines are perpendicular, they form a 90° angle, or a right angle. By definition, two perpendicular lines intersect at a right angle. For instance, a vertical line and a horizontal line will cross at a 90° angle.

I
I
I_
I_I______

Here is a (very crude) sketch of two perpendicular lines. The box between the place where the lines intersect indicates a right angle.

Hope this helps!

A cross because they are intersecting each other at the center of each line.

a keyboard is on sale for $676. If this price represents a 20% discount from the original price, what is the original price to the nearest cent?

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find the 20% discount of 676 which is 135.2 then add it back to 676 and you would get $811.20

Dianna has 7 quarters, 3 dimes, and 8 nickels in her purse. She reaches into her purse and randomly grabs two coins. What is the probability that Dianna grabs a dime first and then a nickel?

Answers

There are 18 coins total in her bag:

7+3+8=18coins

3 of the 18 coins are dimes, so the odds of first drawing a dime are 3/18

P(dime)=3/18

Since the nickel was taken out and not replaced, there are now 17 coins in her purse.

18-1=17coins

8 of the 17 remaining coins are nickels, so the odds of drawing a nickel are 8/17.

P(nickel)=8/17

Now we multiply the two probabilities by eachother to find out the odds of both occurring...

P(dime)*P(nickel)=

3/18*8/17=24/306=8/103=0.078=8%

The probability of grabbing a dime and then a nickel are 8/103 or 0.078 or an 8% chance, whichever way you'd prefer to write it.

What is the answer
(x³)^4

Answers

Answer:

the answer is x^12

Step-by-step explanation:

multiply 3 by 4 and you get 12

Answer:

Step-by-step explanation:

x^3^4

x^12 multiply the powers

If A=kr² and V=kr³, find the percentage increase in A and V if r is increased by 20%

Answers

Answer:

The percentage increase in A is 44%. The percentage increase in V is 72.8%.

Step-by-step explanation:

The easiest way to go about solving this problem is to pick your own numbers and plug them into the given equations.

For example, let's say that k = 5 and that r = 10.

$A=kr^(2)$ ⇒ $A= 5 * 10^(2) =500$

$V=kr^(3)$ ⇒ $V= 5 * 10^(3)= 5000$

The question is asking, what is the percentage increase if r is increased by 20%. Our chosen k-value will stay the same but our r-value is going to increase. To find the new value of r, we multiply 10, our current value of r, by 1.2. This gives us a new value for r, which is 12.

$10*1.2=12$