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soldi70 [24.7K]

3 years ago

13

Simplify -3(2x-7) + 5(4x-8).

1 answer:

Ipatiy [6.2K]3 years ago

8 0

Answer:

14x-19

Step-by-step explanation: Now can someone answer my question look at my page

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Please answer the wrong question

Hunter-Best [27]

Okay so this one was a bit more confusing for me but I think the answer is 25 bottles for the similar garden, let me know if I'm wrong and I'll try again.

6 0

3 years ago

How to find 4 times (-5)

vfiekz [6]

Answer: -20

Step-by-step explanation: Using the same expression except positive numbers, 4 x 5 = 20.

In this case, we can use this equation to find the product for the expression

4 x -5.

If 4 x 5 = 20, then 4 times -5 will also equal 20. However, since there is a negative factor in this expression, our answer will be negative causing our answer to be <u>-20.</u>

6 0

4 years ago

Read 2 more answers

Answer the following.

Assoli18 [71]

Answer:

40000

Step-by-step explanation:

Simple interest (I) is calculated as

I = $\frac{PRT}{100}$

P is the amount borrowed , R is the interest and T the time in years

Here I = 2000 , R = 5 and T = 1 with P to be found , then

2000 = $\frac{P(5)(1)}{100}$ ( multiply both sides by 100 )

5P = 200000 ( divide both sides by 5 )

P = 40000

5 0

3 years ago

Read 2 more answers

The mass, m grams, of a radioactive substance, present at time t days after first being observed, is given by the formula m=24e^

Reika [66]

Answer:

(i) The value of<em> m</em> when t = 30 is 13.2

(ii) The value of <em>t</em> when the mass is half of its value at t=0 is 34.7

(iii) The rate of the mass when t=50 is -0.18

Step-by-step explanation:

(i) The <em>m</em> value when t = 30 is:

$m = 24e^{-0.02t} = 24e^{-0.02*30} = 13.2$

Then, the value of<em> m</em> when t = 30 is 13.2

(ii) The value of the mass when t=0 is:

$m_{0} = 24e^{-0.02t} = 24e^{-0.02*0} = 24$

Now, the value of <em>t </em>is:

$ln(\frac{m_{0}/2}{24}) = -0.02t$

$t = -\frac{ln(\frac{24}{2*24})}{0.02} = 34.7$

Hence, the value of <em>t</em> when the mass is half of its value at t=0 is 34.7

(iii) Finally, the rate at which the mass is decreasing when t=50 is:

$\frac{dm}{dt} = \frac{d}{dt}(24e^{-0.02t}) = 24(e^{-0.02t})*(-0.02) = -0.48* (e^{-0.02*50}) = -0.18$

Therefore, the rate of the mass when t=50 is -0.18.

I hope it helps you!

3 0

3 years ago

PRESS ON THE PHOTO!! ONLY NUMBER 10 PLEASE

marta [7]

Answer:

B: T = ½R

Step-by-step explanation:

From the given graph, we see the following;

When T = 2, R = 4

When T = 3, R = 6

When T = 4, R = 8

When T = 5, R = 10

Looking at those values, we can see a pattern where R is always equal to 2T.

Or T = ½R

Thus, option B is the answer.

8 0

3 years ago