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SCORPION-xisa [38]
3 years ago
15

Solve the equation -3(y-5)=24

Mathematics
2 answers:
deff fn [24]3 years ago
5 0
The answer to your question is y=-3
Alik [6]3 years ago
3 0
-3(y-5)=24
-3y+15=24
     -15 =-15
-3y=9
-3 divided into 9 is -3 
y=-3
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if a population doubles every 5 years how many years would it take for the population to increase by 10 times original amount?
Alecsey [184]
25 years is the answer
7 0
3 years ago
I need help please. Thanks!
Karolina [17]

Answer:

A

Step-by-step explanation:

We are given the function f and its derivative, given by:

f^\prime(x)=x^2-a^2=(x-a)(x+a)

Remember that f(x) is decreasing when f'(x) < 0.

And f(x) is increasing when f'(x) > 0.

Firstly, determining our zeros for f'(x), we see that:

0=(x-a)(x+a)\Rightarrow x=a, -a

Since a is a (non-zero) positive constant, -a is negative.

We can create the following number line:

<-----(-a)-----0-----(a)----->

Next, we will test values to the left of -a by using (-a - 1). So:

f^\prime(-a-1)=(-a-1-a)(-a-1+a)=(-2a-1)(-1)=2a+1

Since a is a positive constant, (2a + 1) will be positive as well.

So, since f'(x) > 0 for x < -a, f(x) increases for all x < -a.

To test values between -a and a, we can use 0. Hence:

f^\prime(0)=(0-a)(0+a)=-a^2

This will always be negative.

So, since f'(x) < 0 for -a < x < a, f(x) decreases for all -a < x < a.

Lasting, we can test all values greater than a by using (a + 1). So:

f^\prime(a+1)=(a+1-a)(a+1+a)=(1)(2a+1)=2a+1

Again, since a > 0, (2a + 1) will always be positive.

So, since f'(x) > 0 for x > a, f(x) increases for all x > a.

The answer choices ask for the domain for which f(x) is decreasing.

f(x) is decreasing for -a < x < a since f'(x) < 0 for -a < x < a.

So, the correct answer is A.

3 0
2 years ago
Bob can row 5 mph In still water. He rows directly across a river flowing at 6 mph. Using vectors, find his resultant
Ivahew [28]

Answer:

7.81mph

Step-by-step explanation:

Using the pythagoras theorem;

resultant r is expressed as;

r² = 5² + 6²

r² = 25 + 36

r² = 61

r =√61

r = 7.81mph

Hence the resultant speed is 7.81mph

7 0
2 years ago
Mika's rosebush had 24 blooms in the first week of May. This was 80% as many blooms as Tammy's rosebush had during the same peri
Harrizon [31]
Tammy’s bush would have 30 blooms. 80% of 30 is 24.
7 0
3 years ago
What must be true for lines a and b to be parallel lines? Select two options.
Rasek [7]

The expression that must be true for a to be parallel to b are mAngle2 = 58Degrees and <1 = 4x - 10

<h3>Lines and angles</h3>

A line is the shortest distance between two points and the point where two lines meet is known as an angle

From the figure shown

m<2 = 58 degrees (alternate exterior angle)

Since the sum of angles on a straight line is 180 degrees, hence;

3x-1+<2 + 4x - 10= 180

3x-1 + 58 + 4x - 10 =180

7x + 47 = 180

7x = 180- 47

7x = 133

x = 19

Hence the expression that must be true for a to be parallel to b are mAngle2 = 58Degrees and <1 = 4x - 10

Learn more on lines and angles here; brainly.com/question/25770607

#SPJ1

8 0
1 year ago
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