MATHEMATICS HIGH SCHOOL

Randy is thinking of a number. When he adds 7 to the number, multiplies the sum by 3, then subtracts 2, the result is 13. What is the original number?A. 6
B. -2
C. 2
D. -6

Answers

Answer 1
Answer:

Answer:

B. -2

Step-by-step explanation:

let the number be x

=7+x

=3(7+x)

=3(7+x)-2

13=3(7+x)-2

solving for  x we have

13=21+3x-2

21+3x-2-13=0

collect like terms we have

21-2-13+3x=0

6+3x=0

6=-3x

x=6/-3

x=-2

The answer is B

B. -2

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Please answer this! I have no idea!

Answers

the domain is all real numbers bc the domain is all x values and the lines continue going left and right and do not stop 

3) The half of (√200 + √128 ) is 1. √100 + √64

2. 9√2

3. 18√2

​

Answers

Answer:

Option 2 i.e. 9√2 is the correct option.

Step-by-step explanation:

Given the expression

(√(200)\:+\:√(128))

The half of (√(200)\:+\:√(128)) can be determined by dividing the expression in half.

Therefore, we need to solve the expression such as

(\left(√(200)\:+\:√(128)\:\right))/(2)

as

√(200)=√(100* 2)=√(100^2* \:2)=10√(2)

√(128)=√(64* 2)=√(8^2* \:2)=8√(2)

so the expression becomes

(\left(√(200)\:+\:√(128)\:\right))/(2)=(10√(2)+8√(2))/(2)

Add similar elements:  10√(2)+8√(2)=18√(2)

                     =(18√(2))/(2)

Divide the numbers: 18/2 = 9

                      =9√(2)

Therefore, we conclude that:

(\left(√(200)\:+\:√(128)\:\right))/(2)=9√(2)

Hence, option 2 i.e. 9√2 is the correct option.

Use the digits 1,3,4,and 7 to create two whole numbers whose product is estimated to be about 600

Answers

Answer: 34 and 17 are two numbers created from the given digits whose product is estimated to be about 600.

Step-by-step explanation:

Let 34 and 17 are two whole numbers created from the given digits.

Case 1) If we multiply 34 and 17 then 34×17=578 if we rounding up to the nearest hundreds we will get 600.

Case 2) If we rounding up the whole numbers before multiplication as

estimate of 34 to the nearest ten is 30 and 17 to the nearest ten is 20

Then the product becomes 30×20=600.

So by both the ways 34 and 17 can be used for estimated product to be 600.
34 x 17  (round the 2 numbers)
30 x 20
   600

Also, 34 x 17 = 578, which rounds to 600


The answer is 34 and 17

after 1 second, the rock is 243 feet in the air; after 2 seconds, it is 452 feet inthe air. find the height, in feet, of the rock after 5 seconds in the air?

Answers

1 second is 243
2 second is 452 
3 second is 661
4 second is 870
5 second is 1,079
It goes up 209 feet per second
5 Second is 1,079 ft in the air.

A car travels at 24mph for 2 hours 20 minutes how far has it travelled

Answers

24 x 2= 48
 There are 6 sets of 20 minutes in two hours  (120 minutes)
48/6=8
8
Or
There are 3 sets of 20 in one hour (60 minutes)
24/3=8
8

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-10, -7, -4, -1, 2, 5, 8

Answers

Answer:

+3 every time or the total?

Or is it 18? U specify which

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