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stellarik [79]
3 years ago
15

Lesson 2 semester B exam algebra 1B unit 7

Mathematics
2 answers:
slava [35]3 years ago
8 0

Answer:

do you have all the answers for the exam, you can get 100 points

brainly.com/question/14257403

Elodia [21]3 years ago
4 0
<h2>Answer:</h2>

720 pounds

<h2>Step-by-step explanation:</h2>

Initially, we have that the amount of algae in the pond is 90pounds. Every four hours the amount of algae doubles. If we called t the time and W the amount of algae, we have that:

At \ t=0 \ hours, \ w=90 \ pounds \\ \\ At \ t=4 \ hours, \ w=2(90)=180 \ pounds \\ \\ At \ t=8 \ hours, \ w=2(180)=360\ pounds \\ \\ At \ t=12 \ hours, \ w=2(360)=720 \ pounds

Finally, <em>after 12 hours the amount of algae in the pond is 720 pounds</em>

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2. Richmond Appliance repairs washing machines. The revenue that the company earns is given by the function R(h) = 20 + 45h doll
Vesnalui [34]
The number of hours needed for the company to break even happens when 
R(h)=C(h)

20+45h= 5h^{2}-30, rearranging to make the equation 'zero' on LHS
0= 5h^{2}-30-20-45h
0= 5h^{2}-45h-50, divide each term by 5
0= h^{2}-9h-10, factorise
0=(h+1)(h-10), equate each factor to zero
h=-1 and h=10

We choose the positive value of h

Hence, the number of hours needed to break even is h=10
6 0
4 years ago
What is the area?<br> 19 mm<br> 10 mm<br> square millimeters
xenn [34]

Answer:

190 square millimetres.

Step-by-step explanation:

19mm×10mm=190mm²

8 0
3 years ago
If an independent-measures design is being used to compare two treatment conditions, then how many different groups of participa
Serhud [2]

Answer:

2 groups and 1 score for each participant

Step-by-step explanation:

An independent measures design is a defined as a research method whereby multiple experimental groups are examined and the participants will only be in one group. Now, each participant will only be affected by one condition of the independent variable during the experiment.

In the question given, we want to use the method I just described to compare two treatment conditions.

This means that there will be two groups and each participant in both groups will be assigned one score.

7 0
3 years ago
What is the perimeter of the triangle
KengaRu [80]

The perimeter of the triangle is 40 units

<h3>Perimeter of a triangle</h3>

From the question, we are to determine the perimeter of the given triangle

From the given diagram, we can observe that the triangle is a right triangle

The vertical length of the triangle is 15 units

and the horizontal length of the triangle is 8 units

Thus,

We can find the hypotenuse by using the<em> Pythagorean theorem </em>

Let the hypotenuse be h

Then,

h² = 15² + 8²

h² = 225 + 64

h² = 289

h = √289

h = 17 units

Now, for the perimeter of the triangle

The perimeter of a triangle is the sum of all its three sides

Thus,

The perimeter. P, of the triangle is

P = 15 + 8 + 17

P = 40 units

Hence, the perimeter of the triangle is 40 units

Learn more on Calculating perimeter here: brainly.com/question/17394545

#SPJ1

4 0
2 years ago
An arfican elephant weighs 6 tons what is the weight of the elephant in pounds? 2000 pounds = 1 ton
grin007 [14]
The answer would be 12,000 pounds. simply multiply 2,000 x 6 = 12,000.
7 0
3 years ago
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