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Karolina [17]
3 years ago
5

PLEASE HELP NO LINKS!! The temperature change in a chemistry experiment was –2C every 30 min.

Mathematics
2 answers:
dexar [7]3 years ago
4 0

Answer:

what do you mean

Step-by-step explanation:

?

Colt1911 [192]3 years ago
4 0

Answer:

The temperature change in a chemistry experiment was -2C every 30 min. The initial temperature was +6C. What was the temperature after 4 h

4 hours = 8 half hours

0, 1, 2, 3, 4, 5, 6, 7, 8 half hours

6, 4, 2, 0, -2, -4, -6, -8, -10

-10 degrees C

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Jim started cleaning at :1009 AM and finished at :1132 AM.<br> How long did it take him?
Goryan [66]

Answer:

1 hour and 23 minutes

Step-by-step explanation:

11:32-10:09=1:23

Thinking through this logically, one hour after 10:09 is 11:09 and we know that it took him longer than this.

We can then subtract the minutes without having to worry about the base-60.  

32 minutes -9 minutes =23 minutes

We then add the 23 minutes to the 1 hour and determine that it took him 1:23 (one hour and twenty-three minutes).

7 0
3 years ago
Read 2 more answers
Find the value of the expression 12x /2y + xy, when x = 2 and y = 4.
Elza [17]

Answer:

56

Easy imma just add random letters but here is your answer jfvnjsamdjvnjnpiesr;jknjlnaviciherklnnfvjln erkjnkjnckjawenrjgnkjev

5 0
3 years ago
a cookie recipe calls for a half cup of chocolate chips per 3 dozen cookies. How many cups of chocolate chips should be used for
Dahasolnce [82]

To answer this question, you should set up a proportion that demonstrates the ratio of chocolate chips to cookies.

\frac{0.5}{36} =\frac{x}{120}

36 and 120 are used because 1 dozen=12.

Cross multiply and solve for x to get the answer.

60=36y

\frac{5}{3}=x

The answer is \frac{5}{3} cups.

3 0
3 years ago
Why does Y equal Mxb?
Deffense [45]

It's just the slope formula.

y = mx + b

The "m" is the slope.

The "b" is the y-intercept.

The y and the x don't change.

7 0
4 years ago
Need help with this math don’t understand
slava [35]

Answer:

A

Step-by-step explanation:

The formula for flipping smth over the x axis is(x,y)→(x,−y)

just flip the symbol on the second #

your points are:

(-4,-2)→(-4,2)

(0,-4)→(0,4)

(-4,-5)→(-4,5)

Once you graph it, youll see that the shapes are congruent, just flipped, therefore the answer is A

3 0
3 years ago
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