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Angelina_Jolie [31]
3 years ago
13

Help me answer this. Please!!!!!

Mathematics
1 answer:
Maru [420]3 years ago
7 0
1/2*2a= 1a
-6b*1/2=-3b
8* 1/2= 4
so 1a-3b+8
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Please help me with #13
marysya [2.9K]
I hope this helps you

8 0
3 years ago
Evaluate the expression w^2 - v + 1 for w = -2 and v = -8<br> a. -3 <br> b. -11<br> c. 13<br> d. 5
wel

Answer:

I think the answer is C. 13.

Step-by-step explanation:

(-2)^2-(-8)+1

4+8+1

12+1

13

6 0
3 years ago
Read 2 more answers
If 1, x, 5 and 15 are in proportion, then the value of x is<br>a. 5<br>b. 4<br>c. 3​
Katen [24]

Answer:

3

Step-by-step explanation:

Here, 1:x =5:15

Solving which the value of x is 3.

6 0
3 years ago
A population of insects increases at a rate 230 + 8t + 0.9t2 insects per day (t in days). Find the insect population after 6 day
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Answer:

The insect population after 6 days is of 1639 insects.

Step-by-step explanation:

A population of insects increases at a rate 230 + 8t + 0.9t2 insects per day

This means that r(t) = 230 + 8t + 0.9t^2

The population of insects after x days is given by:

P(t) = \int_{0}^{x}r(t)dt

So

P(x) = \int_{0}^{x} (230 + 8t + 0.9t^2)

P(x) = 230t + 4t^2 + 0.3t^3 + K|_{0}^{x}

P(x) = 230x + 4x^2 + 0.3x^3 + K

In which K is the initital population(which is 50). So

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After 6 days:

P(6) = 230*6 + 4*6^2 + 0.3*6^3 + 50 = 1638.8

Rounding to the nearest insect, 1639

The insect population after 6 days is of 1639 insects.

7 0
3 years ago
You need $3,000 to buy a new stereo for your car. If you have $1,200 to invest at
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Answer:

15 years and 8 months

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I used the formula for compound interest as shown below and solved for the unknown, time.

Since our interest is compounded annually (So once a year) our m value is 1.

3 0
2 years ago
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