-x + 2y - z = 0
-2x + 4y + z = 3
Answer:
Choice A
Step-by-step explanation:
The scenario presented relates to exponential growth models; the population of bacteria is growing at an exponential rate given by the equation;
In this case B represents the population of the bacteria, t the time in minutes, k the growth constant and 1000 represents the initial population at time 0.
After 15 minutes, the population of bacteria grows to 8520. This implies that B is 8520 while t is 15. We substitute this values into the given equation and solve for k, the growth constant;
Divide both sides by 1000;
The next step is to introduce natural logs on both sides of the equation;
2x2 + 8x – 24 = 0
3x2 – 4x – 12 = 0
3x2 + 12x + 36 = 0
we know that
using a graph tool
let's proceed to graph each case to determine the roots
case 1)
the roots are
------> is not the solution
see the attached figure N
case 2)
the roots are
see the attached figure N --------> is the solution
case 3)
the roots are
------> is not the solution
see the attached figure N
case 4)
the graph does not have x-intercepts
see the attached figure N ------> is not the solution
therefore
the answer is
the solution is
Answer:
Width = 57cm
Step-by-step explanation:
The area of a rectangle can be found by using the formula:
Area = Length * Width
Since we know that the area is 4275cm² and the length of the painting is 75cm, we can plug these into the above equation to solve for the width.
Area = Length * Width
4275cm² = 75cm * Width
To find the width, we can simply divide both sides by 75 so that the width measurement is isolated:
Width = 57cm
To verify this, we can multiply the length and width to see if the area equals 4275cm²:
75cm * 57cm = 4275cm²
Complete Question
The front of a podium is in the shape of a trapezoid with base lengths 4 and 8.5 feet. the height is 2 feet. a gallon of paint covers about 350 square feet. Bryan wants to paint the front of the podium blue. He decomposed the shape into two triangles and a rectangle to find the area.
How many front frames of a podium can Bryant paint with 2 gallons of paint?
Answer:
56 front podiums
Step-by-step explanation:
A proper look at the image attached will provide the explanations
Answer:
Step-by-step explanation:
Given:
Base length:
A = 8.5 m
B = 4 m
Height, h = 2 ft
1 gallon = 350 ft^2
Area of trapezoid = 1/2 × (A + B) × h
= 1/2 × (8.5 + 4) × 2
= 12.5 ft^2
1 gallon = 350 ft^2
2 gallons = 700 ft^2
1 podium = 12.5 ft^2
= 700/12.5 podium
= 56 podiums will be painted with 2 gallons of paint.