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Slav-nsk [51]
4 years ago
5

Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multi

plied the sum by 2, it would equal 8. Which equation could Stephanie use to find the number, x?
Mathematics
1 answer:
faust18 [17]4 years ago
3 0

Answer:

4 (x + 7) = 8

Step-by-step explanation:

4 (x + 7) = 8 Because you add 7 to Amy's number  then multiplied by 4 which equals 8

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Given: — <br> Xw Is an altitude <br> M Prove: x=12
blsea [12.9K]

Answer:

See explanation

Step-by-step explanation:

<u>Given:</u> XW is an altitude

m∠XWY=8x-6

<u>Prove:</u> x=2

<u>Solution:</u>

      Statement                                 Reason

1. XW is an altitude                         Given

2. m∠XWY = 90°                            Definition of altitude

3. m∠XWY = 8x - 6                         Given

4. 8x - 6 = 90                                  Substitution property

5. 8x - 6 + 6 = 90 + 6                     Addition property of equality

   8x = 90

6. x = 12                                          Division property of equality

4 0
3 years ago
Jason jumped off of a cliff into the ocean in Acapulco while vacationing with some friends. His height above ocean measured in f
lbvjy [14]

Answer:

480 feet.

Step-by-step explanation:

We are told that the function h(t)=-16t^2+16t+480 models Jason's height above ocean measured in feet as a function of time and t is the time in seconds from jumping off.

To find the height of cliff we need to substitute t=0 in our given function as at t=0 we will get Jason's height above ocean which is same as the height of the cliff.

Upon substituting t=0 in our function we will get,

h(0)=-16(0)^2+16*0+480

h(0)=-0+0+480

h(0)=480

Since, the function gives Jason's height above ocean in feet, therefore, the cliff was 480 feet high.

8 0
3 years ago
1. $20,000 placed in a saving<br> account at 4% for 5yrs
Alecsey [184]

Answer:

you will earn 4000 after 5 yr.

Step-by-step explanation:

to find out you need to multiply 20000 by .04 to get 800 per year then multiply that by 5 which gives you 4000

5 0
3 years ago
Rebecca bought some snacks at the bulk food store. She scooped and
oee [108]

Answer:

1.85

Step-by-step explanation:

3 0
3 years ago
Mandy bought a sweater that cost d dollars. She paid the clerk $40.00. Which expression shows her purchase?
ElenaW [278]
Answer:

$40.00 - d

thats the expression
3 0
3 years ago
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