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Gnesinka [82]
2 years ago
11

Please help me 7th grade math operations with rational numbers

Mathematics
1 answer:
Katena32 [7]2 years ago
5 0
1. Stock Market:
If a stock price decreased $2 per day for four days, then the total change in value of the stock is $8. (2 x 4)
Answer: $8.

2. Evaporation:
With the given information, we can infer that if 3 inches of water in a tank decreases each week, then 15 inches of water would decrease over the course of 5 weeks. (3 x 5)
Answer: 15 inches.

3. Football:
If a football team lost 9 yards on 3 consecutive plays, then the team's total change in position is 27 yards. (9 x 3)
Answer: 27 yards.

Hope this helps! Good luck.
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kherson [118]
(9 - 7 × 3 + 4)²
(9 - 21 + 4)²
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(-12)²
144
5 0
3 years ago
2x + 9 = 23 solve by trial
Allisa [31]

Answer:

i tried it by trial and error, and my work is below.

Step-by-step explanation:

2x + 9 = 23

subtract 9 from both sides

2x = 14

guess.... lol

x=7

8 0
3 years ago
What is the value of X in 1.2÷0.3= X÷0.4
sashaice [31]

1.2 \div .3 = 4
4 = x \div .4
multiply both sides by .4 to isolate the x variable.

4 \times .4 = x

x = 1.6
8 0
3 years ago
Read 2 more answers
Find the missing side
lisabon 2012 [21]

Answer: 1) The missing length is 40.   2) The missing side is 30 .

Step-by-step explanation:

1)  9^2  + b^2 = 41^2

   81  +  b^2 = 1681

   -81                   -81

   b^2 =  1600

b= 40

2)  24^2 + 18^2 = c^2

 576  + 324 = c^2  

 900 =c^2

c= 30

5 0
3 years ago
What is the 20th term in this sequence .05,.1,.2,.4,...
Jlenok [28]

We can set up an equation.


.05 * 2^(n-1)


n being the nth term in the sequence


Plug in and solve.


.05 * 2^(20-1)


.05 * 2^19


.05 * 524, 288


The 20th term would be 262, 144.

7 0
3 years ago
Read 2 more answers
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