Answer:
Complete the square to determine the number of solutions#1
b² -4b + 3 = 0b² - 4b + 4 = 1(b - 2)² = 1Two solutions#2
2n² + 7 = -4n + 52n² + 4n + 2 = 0n² + 2n + 1 = 0(n + 1)² = 0One solution#3
x - 3x² = 5 + 2x - x²3x² - x² + 2x - x + 5 = 02x² + x + 5 = 0x² + x² + 2*1/2x + 1/4 + 4 3/4 = 0x² + (x + 1/2)² + 4 3/4 = 0No solutionsAnswer:
b^2-4b+3=0
b²-3x-b+3=0
b(b-3)-1(b-3)=0
(b-3)(b-1)=0
either
b=3 or b=1
.
2n^2 + 7 = -4n + 5
2n²+4n+7-5=0
2n²+4n+2=0
2(n²+2n+1)=0
(n+1)²=0/2
:.n=-1
.
x - 3x^2 = 5+ 2x - x^2
0=5+ 2x - x^2-x +3x^2
0=5+x+2x²
2x²+x+5=0
comparing above equation with ax²+bx +c we get
a=2
b=1
c=5
x={-b±√(b²-4ac)}/2a ={-1±√(1²-4×2×5)}/2×1
={-1±√-39}/2
In 1998 there were 305 students who graduated from high school. In 2019, there were 356 students. What is the rate of change in the number of students?
1. About 1 student per year
2. about 51 students per year
3. about 2 students per year
4. about 5 students per year
Answer:
3. about 2 students per year
Step-by-step explanation:
The rate of change would be the difference in the number of students divided by the number of years passed.
So, rate of change = [tex]\frac{356-305}{2019-1998}[/tex]
= [tex]\frac{51}{21} = 2.43[/tex]
So it's around 2 students per year.
I hope this is correct and helps!
May someone please help me with this :)
please help with this!!!
8 is added to a number
Answer:
what the question?
Step-by-step explanation:
A local artist, Sally, had a total of $2,610 at the end of the State Art Fair. She sold each of her paintings for $45. How many paintings did she sell?
Mark prepared 8 kilograms of dough after working 2 hours. How many hours did Mark work if he prepared 12 kilograms of dough? Solve using unit rates.
Answer: 2 and a half hours
Step-by-step explanation:
(I forgot to place the picture) A local taxi company charges a base fare of $3.20. The taxi company charges $0.40 for every minute the taxi is in service.
Answer:
5 minutes costs 5.20 10 minutes cost 7.20 $20 gets you 42 minutes
Step-by-step explanation:
for 5 and 10 multiply the number of minutes by the price per minute then add 3.2 base fee. 5*.4=2 +3.2=5.2 10*.4=4 +3.2=7.2
For $20 subtract the 3.2 base fee (16.8) and divide that by the .4 a minute fee to get 42 which would be 42 minutes.
Can someone please help me with math.
A balloon is floating above a lake and a sunken canoe is below the surface of the lake. The balloon’s vertical position is 12 meters and the canoe’s is -4.8 meters. The equation represents this situation.
Complete question :
A balloon is floating above a lake and a sunken canoe is below the surface of the lake the balloons vertical position is 12 meters and the canoes is -4.8 meters the equation the equation 12+d= -4.8 represents the situation 1. What does the Variable d represent 2. What value of d make the equation true
Answer:
d = lake
d = - 16.8
Step-by-step explanation:
The scenario described is represented by the equation :
12 + d = - 4.8
The variable d in the equation would refer to the surface of the lake. Hence, the lake is represented as d ;
For the equation above to be true such that the position of canoe is - 4.8
The we solve for d in the equation given :
12 + d = - 4.8
12 + d - 12 = - 4.8 - 12
d = - 16.8
A construction crew is paving a road. The crew has already paved 1,000 square feet and can pave at a rate of 300 square feet of road per hour. The function f(x) = 300x
Answer:
Step-by-step explanation:
i go to southwind what’s the answer ??
The crew would spend 3.33 hours to pave a road that is 1,000 ft².
A linear equation is in the form:
y = mx + b;
where y, x are variable, m is the slope of the line and b is the y intercept.
Let f(x) represent the amount of space paved in x hours.
Given the function:
f(x) = 300x
Therefore to pave 1000 ft²:
1000 = 300x
x = 3.33 hours
The crew would spend 3.33 hours to pave a road that is 1,000 ft².
Find out more at: https://brainly.com/question/21105092
Which graph best represents y = 10 ( 0.85 ) x ?
Answer:i think it’s G
Step-by-step explanation:I used Photomath for graphing
Answer:
G
Step-by-step explanation:
I did it and got it right
What is the area of this circle?
Answer:
The area will be 113.1
Step-by-step explanation:
hope it helps u
have a great day
Please help due today
Find the slope of the line that passes through each pair of points (0,1),(2,5)
Answer:
2
Step-by-step explanation:
y2-y1 = 5-1 =4
x2-x1= 2-0 =2
4/2=2
Step-by-step explanation:
[tex]m = \frac{y2 - y1}{x2 - x1} \\ = \frac{5 - 1}{2 - 0} \\ = \frac{4}{2} \\ = 2[/tex]
#CMIIWfind radian measure when r=2.5m and l=4.5cm
Answer:
Step-by-step explanation:
s = rθ, where r is the radius, θ is the radian measure of the central angle, and s is the arc length.
4.5 = 2.5θ
4.5 / 2.5 = θ
1.8 = θ
5x - 9y = -13
-2x + 3y = 4
Can you explain more? if your looking for the slope of both it is 5/9 for the fist one and 2/3 for the second. If your looking for y and x -intercept for the first one x intercepts at (-2,0) and y intercepts at (0, 4/3) and, for the second one x intercepts at ( -13/5, 0) and y intercepts at (0, 13/9)
I really need help...Will mark brainiest
Answer:
x² + 18x +81
x² - 14x +49
4x²- 4x - 1
Step-by-step explanation:
multiply the x in the first parentheses by x and 9 in the other parentheses and
multiply the 9 in the first parentheses by x and 9 in the other parentheses and add all together
(x+9)(x+9)
x² + 9x + 9x + 81
x² + 18x +81
multiply the x in the first parentheses by x and -7 in the other parentheses and multiply the -7 in the first parentheses by x and -7 in the other parentheses and add all together
(x-7)(x-7)
x² -7x - 7x +49
x² - 14x +49
(2x-1)² is the same as (2x-1)(2x-1)
multiply the 2x in the first parentheses by 2x and -1 in the other parentheses and multiply the -1 in the first parentheses by 2x and -1 in the other parentheses and add all together
(2x-1)(2x-1)
4x²-2x-2x+1
4x²- 4x - 1
Which statement describes the end behavior of this absolute value function? Y $ 6 2 2 O A. As x approaches negative infinity, (x) approaches negative infinity. B. As x approaches positive infinity, (x) approaches negative infinity. C. As x approaches positive infinity, fx approaches positive infinity. D. As x approaches negative infinity, Ax) is no longer continuous,
Answer:
C. As x approaches positive infinity, f(x) approaches positive infinityStep-by-step explanation:
The function f(x) reaches positive infinity in both cases, when x reaches either minimum or maximum valueCorrect choice is C.
Mr Abraham is able to divide the learners in his mathematics class into equal groups of 2, 5 or 6 without leaving any learners out. What is the smallest possible number of learners in the class
Answer:
30
Step-by-step explanation:
Find the lowest number divisible by both 6, 5, and 2.
To start, let's list off the numbers divisible by six, and see if we can check any of them off for 5. Since both 2 and 6 are even numbers, we know that if a number is divisible by 6, it's divisible by 2.
6 12 18 24 30 36 42 48 54 60
All of these numbers are divisible by two. Let's find the lowest one that is divisible by 5. We know this by either the umber ending in 5 or 0.
30 is the lowest number that is divisible by 2, 5, or 6.
Using the graph, determine the equation of the circle
Answer:.
Step-by-step explanation:
Well if you look at the graph and first look at the
joe nuts
ASAP plz I’m being times 40 point + Brainly for correct find slope and rate of change
Answer:
slope: -30x
rate of change: -30
Step-by-step explanation:
[tex] \frac{change \: in \: y}{change \: in \: x} [/tex]
[tex] \frac{ - 30}{1} [/tex]
slope = -30x
rate if change: -30
what is the slope?
please hurry!
y=-x - 3
Answer:
Step-by-step explanation:
slope =
The equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b) a point on the line
y + 3 = (x - 2) is in this form
with slope m =
Answer:
-x is the slope
Step-by-step explanation:
Find the sum
(7x^6 + 2x^5 – 3x^2 + 9x) + (5x*5 + 8x^3 – 6x² + 2x - 5) =
Answer:
i think
7x^6+7x^5+8x^3-9x^2+7x-5
please help me on this math I have been trying to solve it but I can't please please help me!!!!!!
Answer:The first table would be a proportional relationship.
Step-by-step explanation:
It's the only table with a constant, which is required in a proportional relationship. The constant would be 1300 which you can find by divided the two numbers in each row.
A composite figure is shown below.
What is the area of the figure?
A 6
B 8
C 9
D 10
Answer:
option C 9 unit².
Step-by-step explanation:
option C 9 units ²
plz mark my answer as brainlist plzzzz.
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What is md enter your answer in the box
A construction company wants to hire x carpenters for $220 a day and y plumbers for $260 a day. the company wants to hire at least 18 workers. it wants to pay no more than $4500 each day.
write a system of inequalities to model the situation (use >, <, <=, =>)
Answer:6
Step-by-step explanation:
$220 × 6 = $1320 this is how much it cost to pay 6 carpenters for one day. Now lets find how much it cost to 12 plumbers at $260 a day. $260 × 12 = $3120 this is how much it costs to pay 12 plumbers a day.
enter the length of PQ to the nearest tenth.
Answer:
[tex]\displaystyle PQ \approx 5.2[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityTrigonometry
[Right Triangles Only] SOHCAHTOA[Right Triangles Only] cosθ = adjacent over hypotenuseStep-by-step explanation:
Step 1: Identify
Angle θ = 55°
Adjacent Leg = PQ
Hypotenuse = 9
Step 2: Solve
Substitute in variables [cosine]: [tex]\displaystyle cos55^\circ = \frac{PQ}{9}[/tex][Multiplication Property of Equality] Isolate PQ: [tex]\displaystyle 9cos55^\circ = PQ[/tex]Evaluate: [tex]\displaystyle 5.16219 = PQ[/tex]Rewrite: [tex]\displaystyle PQ = 5.16219[/tex]Round: [tex]\displaystyle PQ \approx 5.2[/tex]The sum of 2/3m and 1/5
What is the value of x when angle 1 is74° and angle 2 is 6x + 8° ?
Answer:
74 + 6x + 8 = 180
6x + 82 = 180
6x = 180 - 82
6x = 98
x = 98/6
x = 16.3
this answer is only correct
when angles in linear pair
HELP IM SOO CONFUSED!
solve the following equation for the value of b. SHOW UR WORK!
16 + 5b = 7b + 4
Answer:
16=2b+4
12=2b
b=6
.............
Answer:
b = 6
Step-by-step explanation:
16 + 5b = 7b + 4 <-- Subtract 5b from the left
16 = 2b + 4 <-- Subtract 4 from the right
12 = 2b <-- Divide by 2
b = 6