Given the roots of 4 and -2 find the equations of the quadratic.
4 points
Answer:
p(x) = x² - 2x -8
Step-by-step explanation:
We need to find the quadratic equation with roots 4 and -2 , we know that if a and ß are the roots of equⁿ , then the polynomial is ,
[tex]\implies p(x) =k[ x^2-(\alpha + \beta)x+\alpha\beta] [/tex]
Where k is constant . Substitute respective values ,
=> p(x) = k [ x² - ( a + ß )x + aß ]
=> p(x) = k [ x² - ( 4-2) x + (4)(-2) ]
=> p(x) = k [ x² -2x - 8 ]
If k = 1 ,
=> p(x) = x² - 2x - 8
5) Mario owns a plumbing business. He charges an hourly rate plus a onetime set up fee. His first job was 4 hours and he charged $450. His second job was 3 hours and he charged $675. If his set up fee is $150, how much does he charge per hour?
Answer:
Results are below.
Step-by-step explanation:
First, we need to calculate the variable income per job:
First job= 450 - 150= 300
Second job= 675 - 150= 525
Now, the hourly rate:
Hourly rate= total variable income / number of hours
First job= 300 / 4= $75
Second job= 525 / 3= $175
It is probably that the second job was 7 hours long. If not, he doesn't charge the same amount per hour
HELP PLS ASAPP !!! :(
Cuánto tiempo debe transcurrir para que un capital de $3,000.00 alcance un monto de $7,000.00, si la inversión se hizo con 5% de interés simple mensual?
Answer:
27 years approx
Step-by-step explanation:
Given data
Principal P= $ 3,000
Final amount A= $ 7000
Rate r= 5%
The simple interest expression is
A=P(1+rt)
substitute and solve for t
7000=3000(1+0.05t)
7000=3000+150r
7000-3000=150r
4000=150t
t= 4000/150
t= 26.66
Hence, the time is 27 years approx
Factor the trinomial into two binomials
x^2+6x+5
Step-by-step explanation:
x^2+6x+5=0
x^2+5x+1x+5=0
x(x+5)+1(x+5)
(x+5)(x+1)
x+5=0 x+1=0
x=-5 x=-1
Please help me!
[One Step Inequalities]
Answer: B
Step-by-step explanation:
Answer:
x is greater than or equal to 4
Step-by-step explanation:
divide both sides by two, treating it as an equation
so x is greater than or equal to 4
Clara wants to run a total of 5miles. Each lap around the track is 0.25 miles. How many laps around the track does Clara need to run to complete 5miles?1 laps 2 laps 17.5 laps 22 laps
Helppppppppppppppppppp
Answer:
x = 3
1. Subtract 5 from both sides of the equation.
6 + 5 = 3 + 1 4 6 + 5 − 5 = 3 + 1 4 − 5
2. Simplify
Subtract the numbers 6 = 3 + 9
3. Subtract 3x from both sides of the equation.
6 = 3 + 9 6 − 3 = 3 + 9 − 3
4. Simplify.
Combine like terms - 3x = 9
5. Divide both sides of the equation by the same term
3 = 9 3 3 = 9 3
6. Simplify
Cancel terms that are in both the numerator and denominator Divide the numbers = 3
b for which -x^2+8x+20=b will have no real roots
Answer:
Step-by-step explanation:
-x² + 8x + 20 = b
-x² + 8x + 20 - b = 0
a = -1 ; b = 8 ; c = 20 - b
There is no real roots.
So, b² - 4ac < 0
Plug in a, b and c values
8²- 4(-1)(20-b) < 0
When we multiply (-1) and (-4), we will get 4
64 + 4(20 - b) < 0
64 + 4*20 - 4b < 0
64 + 80 - 4b < 0
144 - 4b < 0
Subtract 144 from both sides
-4b < -144
Divide both side by -4 and when we are dividing by (-4), < will change to >
b > -144/-4
b > 36
So, when value of b is greater than 36, the equation will have no real roots.
Complete the following
a)
3
5
20
b)
11
25
30
6.
Answer:
The answer should be B
Y=x-1 what's the slope please help me I have a test!! :/
Answer:
you need to add them toether since there is only one .
Step-by-step explanation:
1=y-x
is 120.4 hundredths or ones or tens or hundreds
Answer:
Not sure what you're asking but 120.4 is
one hundred
two tens
and four tenths
I cant seem to figure this out. Help
Answer:
108 cm^2
Step-by-step explanation:
This solid is a triangular prism.
The total surface area is made up of the area of 5 faces.
The front and rear faces are called the bases and are two congruent triangles.
The other three faces are three rectangles and form the lateral area.
SA = area of bases + lateral area
The area of the bases is 2 times the area of a triangle.
The lateral area is the sum of the area of the three lateral faces, 3 rectangles, and is also the product of the perimeter of the base and the height of the prism.
SA = 2 * bh/2 + PH
where
b = base of triangular base,
h = height if triangular base,
P = perimeter of the base, and
H = height of the prism
SA = 2 * (3 cm)(4 cm)/2 + (3 cm + 4 cm + 5 cm) * (8 cm)
SA = 12 cm^2 + 96 cm^2
SA = 108 cm^2
write the following number in standard form plezz
7.6 x 10^3
10^3=1,000
Anything multiplied by 1 is that number. In this case, multiply 7.6 by 1, then add 3 zeroes.
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hope it helps
Answer:
7,600
Step-by-step explanation:
when you have to multiply by 10 to a power, you just move the decimal to the left as many times as by the power
15+(√9 *7)/3
Simplify
Step-by-step explanation:
15+(3×7)/3
simplify by 3
15+7
22
which of the following could be the lengths of the sides of a triangle?
a. 1,2,1
b.2,3,1
c.3,5,4
d.7,15,7
Answer:
C
Step-by-step explanation:
The general rule is that any two leg lengths must exceed the third.
A) won't. 1 + 1 = 2. The 2 ones lay flat across the 2.
B) 2 + 1 = 3. Won't work for the same reason as A
C) works fine. Any 2 will exceed the third.
D) can't happen. 7 + 7 < 15.
What is the estimated situation.
Answer:
Please show more information!
Step-by-step explanation:
Answer:
Lookin good soldier. Troops are ripping through their pathetic defenses. They're already runnin for the hills.
Convert the equation –9x2 + 25y2 – 100 – 125 = O into standard form.
Answer:
C. (y-2)^2/9 - x^2/25 = 1
Step-by-step explanation:
Edge 2021
Alyssa is going to invest in an account paying an interest rate of 4.3% compounded daily. How much would Alyssa need to invest, to the nearest dollar, for the value of the account to reach $330 in 17 years?
Answer:
159
Step-by-step explanation:
158.877856673=P
round:
P=159
Answer:
159
Step-by-step explanation:
In the parallelogram below, AC = 18, BD = 30, and BC = 15. What is the length of EC?
Answer:
30
Step-by-step explanation:
PLZ HELP IF ITS CORRECT I WILL MARK U BRAINLIEST
Answer:
The answer is 45
Step-by-step explanation:
First, you find what is half of 30 by dividing 30 by 2
30/2 = 15
Then you add 15 to 30 since you have to increase it by 1/2
30 + 15 = 45
I hope this helped and have a great day!
If one figure is translated, rotated and dilated to create its image, the two figures will be __________ .
Group of answer choices
translation
congruent
similar
opposite
PLEASE ANSWER ASAP
Which expression is equivalent to -28 x 2 + 35 x ?
Answer:
35+28=31
Step-by-step explanation:
find the value of the variable and the length of each chord.if necessary, round your answers to the nearest tenth
Answer:
X = 2.4
MN = 7
JL = 7.4
Step-by-step explanation:
Complete the equations below.
Answer:
3.64 ÷ 7 = 364 hundredths ÷ 7
3.64 ÷ 7 = 52 hundredths
3.64 ÷ 7 = 0.52
Step-by-step explanation:
who's holika & who is bhakt prahlad ????
Answer:
Hello There!!
Step-by-step explanation:
The answer is that there was once a demon king called Hiranyakashyap, who believed that he was more powerful than the all the gods and he wanted everyone like all the people to worship him but his son, Prahlad, did not worship his father.
hope this helps,have a great day!!
~Pinky~
The expression (3 + 6i) + (5 - 10i) simplified is
Answer:
The answer is 8 - 4i
you collect the like terms
A rectangular prism has a length of 2 1/2 meters, a width of a moters, and a height of 2 1/4 meters,
What is the volume of the prism?
Enter your answer in the box as a simplified mixed number or a decimal,ima abt to get my a.s whooped so please help
Answer:
53
Step-by-step explanation:
Answer:
answer is 22 1/2 or in decimal form it would be 22.5
Step-by-step explanation:
angelica owns 3 1/4 acres of land . she grows cabbage on 3/4 of the land. on how many acres of land does angelica grow cabbage
Answer:
2.4375 acres for cabbage
Step-by-step explanation:
Determine the value of y-x ( •︠ˍ•︡ )
Answer:
822
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