3 years ago

PLEASE HELP @) POINTS!!! Which of these is true of a chemical reaction?

Mathematics

2 answers:

lakkis [162]3 years ago

8 0

Energy is either released or absorbed

mrs_skeptik [129]3 years ago

4 0

C, the energy is either released or absorbed

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Devin jumped off a cliff into the ocean in Acapulco while vacationing with his family. His height as a function of time could be

sukhopar [10]

Answer:

<em>3 seconds</em>

Step-by-step explanation:

Given the height modelled by the function

h(t) = -16t² + 16t + 96

The hit the water at h(t) = 0

0 = -16t² + 16t + 96

Divide through b y -16

0 = t² - t - 6

t² - t - 6 = 0

t² - 3t+2t - 6 = 0

t(t-3)+2(t-3) = 0

t+ 2 = 0 and t - 3 = 0

t = -2 secs and t = 3secs

Since t can't be negative, hence;

t = 3 secs

<em>hence it will take 3 seconds until Devon hit the water</em>

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3 years ago

You will now see two questions that may look a little different.

kondaur [170]

The answer is -2x=-6

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3 years ago

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How can you find the unit rate on a graph that goes through the origin?

Andrew [12]

Answer:

In an equation in the form , the unit rate is the number represented by the . If a graph of a line passes through the origin and contains the point , representing the unit rate, then the relationship is proportional.

Step-by-step explanation:

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3 years ago

in the 9th grade, 7 of every 10 students is a girl. if there are 200 students in the 9th grade, how many of the students are gir

zubka84 [21]

Ratio of girls = 7/10

So, no. of girls = 200 × 7/10 = 20×7 = 140

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3 years ago

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Give The Algebraic Expression

bulgar [2K]

1. 5-x=15

2. x+12<25

3. 2x-5>47

4. 4(8+x)=88

5.

$\frac{2}{3} x = 72$

6. x+15=-8

7. x-48=62

8. 10÷2x<1/4

9.

$2x - \frac{1}{3} x = 28$

10. 2+2x=48

11. 4x+8=20

12. 6x+19=79

13. 6x-8>15

14. x+(x+1)=29

15. x+(x+2)=46

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3 years ago