Answers
Answer:
(- 3, 0 ) and (5, 0 )
Step-by-step explanation:
To find the x- intercepts let f(x) = 0 , that is
x² - 2x - 15 = 0
Consider the factors of the constant term (- 15) which sum to give the coefficient of the x- term (- 2)
The factors are - 5 and + 3 , since
- 5 × 3 = - 15 and - 5 + 3 = - 2 , then
(x - 5)(x + 3) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 5 = 0 ⇒ x = 5
x + 3 = 0 ⇒ x = - 3
The x- intercepts are (- 3, 0 ) and (5, 0 )
Related Questions
I need help with this problem, if someone could help me? Please don't guess I really need to understand this algebra.
Answers
Hi, sir or ma'am, you said you needed help but you provide no information on what to help you with, no picture or anything.
Answer:
You need to upload an image of what you are talking about
Step-by-step explanation:
What is the distance between the points (4,7) and (4, -5)
Answers
Hope this helps!
Answer: It is 12
Step-by-step explanation:
A = 1/2 h(b^1 + b^2) solve for b^2
Answers
Answer:
[tex]b_{2} = \frac{2A}{h} - b_{1}\\[/tex]
Step-by-step explanation:
[tex]A = \frac{1}{2} h(b_{1} +b_{2})\\2A = h(b_{1} +b_{2})\\\frac{2A}{h} = b_{1} +b_{2}\\\frac{2A}{h} - b_{1} = b_{2}\\[/tex]
Find the missing length indicated
Answers
Step-by-step explanation:
10)
again, drawing the height into a right triangle creates 3 right triangles : the original one, and the 2 on both sides of the height.
all these 3 triangles are similar to each other (the angles must be the same).
therefore the ratio of 2 sides in one triangle must be the same as the ratio of the corresponding 2 sides in the other triangles.
so,
x/36 = 64/x
x² = 64×36
x = sqrt(64×36) = 8×6 = 48
11)
same principle.
x/36 = 100/x
x² = 100×36
x = sqrt(100×36) = 10×6 = 60
12)
same as 11)
x/9 = (16+9)/x = 25/x
x² = 25×9
x = sqrt(25×9) = 5×3 = 15
help for brainliest please
Answers
Answer:
2nd option: P'Q'=16.8 mm
Step-by-step explanation:
Translating vertically just means the graph shifted up or down in the direction of y axis, it will not change the shape or size of the original graph.
¿Es 42.497.365 divisible por 6?
Answers
No, 42,497,365 is not divisible by 6.
Hope it helps you! :)
[tex]GraceRosalia[/tex]
If u guys help
Me this should be easy depending on who’s doing it ok what are the answers to this u guys have to figure it out This is 3rd grade homework I trying to help my friend and he doesn’t know what the rest are can u help please asap
Name
wrap
sign
wrote
gnaws
wring
knee
wreath
knit
knife
knight
knock
write
gnome
wrists
wreck
A. Write the spelling words that match the clues below.
1. street marker
S
4. a sharp tool
ínite
MA
2. tap on a door
5. cover a gift with paper
3. a ring of plants used for
decoration
B. Write the spelling word that best completes each sentence.
6. The doctor checked both her
after she fell.
P
7. He
a letter to the mayor about the park.
8. I am learning to
a wool scarf.
9. A beaver
trees into logs.
10. My friend likes to
silly poems about animals.
11. My little sisters
my room when they come in.
12. My story is about a brave
- who fights dragons.
13. I scraped my left
when I fell off my bike.
14. A
is small and usually wears a pointed hat.
15. We will
out the wet towels.
Answers
Answer: look at explanation
Step-by-step explanation:
number 3. wreath
number 8. knit
number 9. gnaws
number 10. write
number 11. wreck
number 12: knight
number 14: gnome
number 15: wring
HELP PLEASE!!!!!!!!!!!
Answers
Answer:
x = 4.4
Step-by-step explanation:
The ratios of corresponding sides are in proportion , that is
[tex]\frac{x}{11}[/tex] = [tex]\frac{4}{10}[/tex] ( cross- multiply )
10x = 44 ( divide both sides by 10 )
x = 4.4
Translate the sentence into an equation.
Two times the sum of a number and 4 equals 9.
Use the variable y for the unknown number.
Answers
Answer:
The equation for this sentence is: 9 = 2(4y)
Answer:
2(y + 4) = 9Step-by-step explanation:
Two times the sum of a number and 4 equals 9:
2(y + 4) = 9HELP PLS its due tomorrow
Answers
Find the missing factor A that makes the equality true
8x 3 =(−2x)(A)
Answers
0.43
decimal place(s)
X 0.2
decimal place(s)
0.086
decimal place(s)
Answers
I hope this helps! Let me know if you have any questions! Good luck on the rest of your assessment!
Mark this as Brainliest if you get a chance:)
A mixed nuts factory makes a 10 pound mixture of almonds, walnuts, and
cashews. Almonds cost $1.25 per pound, walnuts cost $2.75 per pound,
and cashews cost $3.15 per pound. The mixture calls for twice as many
almonds as walnuts. The total cost of the mixture is $18.90. How much of
each ingredient did the store use?
This is a System of equations problem
Answers
Answer
x+y+z=10
1.25x+2.75x+3.15x+18.90
x=2z
Step-by-step explanation:
x=almonds
y=walnuts
z=cashews
9514 1404 393
Answer:
6 pounds almonds3 pounds walnuts1 pound cashewsStep-by-step explanation:
We can let a, w, c represent pounds of almonds, walnuts, and cashews, respectively. Then the given relations are ...
a +w +c = 10 . . . . . total pounds of nut mix
a = 2w . . . . . . . . . twice as many almonds as walnuts
1.25a +2.75w +3.15c = 18.90 . . . . total cost of the mix
__
Solving the system of equations can proceed by any of the methods you have learned for systems of two equations in two unknowns. Substitution, elimination, and matrix methods all work. Graphing methods are also available.
We can easily reduce this system to two equations in two unknowns by using the second equation to substitute for 'a'.
2w +w +c = 10 ⇒ 3w +c = 10
1.25(2w) +2.75w +3.15c = 18.90 ⇒ 5.25w +3.15c = 18.90
Solving the first of these equations for c, then substituting into the second of these equations gives ...
c = 10 -3w
5.25w +3.15(10 -3w) = 18.90
-4.20w +31.50 = 18.90 . . . . simplify
12.60 = 4.20w . . . . . . . . . . . add 4.20w -18.90
3 = w . . . . . . . . . . . . . . . . . . . divide by 4.20
c = 10 -3(3) = 1 . . . . . . . . . . . use the expression for c
a = 2(3) = 6 . . . . . . . . . . . . . use the expression for a
The nut mix used 6 pounds of almonds, 3 pounds of walnuts, and 1 pound of cashews.
_____
Additional comment
The attached graph shows one way to obtain a graphical solution. The first and third equations were solved for c, and those expressions were set equal to obtain the graph for the red line. The blue line is the second equation. Here, we have used (x, y) for (a, w). The solution for these variables is (a, w) = (6, 3). Using the first expression for c gives c = 10 -(6+3) = 1. This is the same solution as above.
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tegin
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the model given below?
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How many blocks were in the picture
Answers
Answer:
where is the picture
Step-by-step explanation:
please help me!!!!!!!
Answers
Answer:
a = 3 , b = 5
Step-by-step explanation:
A robot can complete 7 tasks in 3/10
hour. Each task takes the same amount of time.
a. How long does it take the robot to complete one task?
b. How many tasks can the robot complete in one hour?
Answers
Answer:
a
Step-by-step explanation:
Answer:
b
Step-by-step explanation:
An airport has an electronic system that randomly selects bags for extra security screening. Each bag has a 14% percent probability of being selected for extra screening, and one bag being selected or not doesn't affect whether or not another bag will be selected. Suppose that 222 bags go through the system, one after the other. What is the probability that both bags are selected for extra screening? Round your answer to two decimal places.
Answers
Probabilities are used to determine the chances of an event.
The probability that the two bags are selected for extra screening is 0.02
The given parameters are:
[tex]n = 2[/tex] --- number of bags
[tex]p = 14\%[/tex] --- the probability that a bag is selected for extra screening
The probability that the two bags are selected for extra screening is:
[tex]P(2) = p^n[/tex]
So, we have:
[tex]P(2) = (14\%)^2[/tex]
Express percentage as decimal
[tex]P(2) = (0.14)^2[/tex]
[tex]P(2) = 0.0196[/tex]
Approximate
[tex]P(2) = 0.02[/tex]
Hence, the required probability is 0.02
Read more about probabilities at:
https://brainly.com/question/11234923
Answer:
0.02 i did khan academy pls mark brainliest
Step-by-step explanation:
Which set of ordered pairs does not represent a function?
O {(5, -1),(-3, -3), (8,4),(4, -3)}
O{(-6, -7), (-3, -3), (-2,-8), (-6,4)}
O {(-2,1),(-8,0), (6, 7), (8, 7)}
O {(5,-3), (-6,2), (-5,3), (1, 2)}
Answers
Answer: set 2 : O{(-6, -7), (-3, -3), (-2,-8), (-6,4)}
Step-by-step explanation: In order for a set of ordered pairs to be a function, then each input can correspond to only 1 output. In the context of your question, this means there cannot be two ordered pairs which have the same x value. The second set of ordered pairs does not represent a function because the input x = -6 corresponds to two different outputs, y = -7 and y = 4.
x2−5x+8 if x=3 plz help
Answers
Answer:
Step-by-step explanation:
if its x to the second power:
(3)^2-5(3)+8= 9-15+8=17-15=2
if it is 2x
2(3)-5(3)+8=6-15+8 =-1
Which equation is the inverse of 2(x - 2)2 = 8(7 + y)?
O -2(x - 2)2 = -8(7 + y)
O yx2-
o yo hx²-x-6
y=-2+ 28+4x
O y=2+28+4x
Answers
Answer:
-2(x-2)2=-8(7+y)
Step-by-step explanation:
Inverse means just -Lets solve afterwards
[tex]\\ \sf\longmapsto -2(x-2)2=-8(7+y)[/tex]
[tex]\\ \sf\longmapsto (-2x+4)2=-56-y[/tex]
[tex]\\ \sf\longmapsto -4x+8=-56-y[/tex]
[tex]\\ \sf\longmapsto -4x+y=-64[/tex]
[tex]\\ \sf\longmapsto 4x-y=64[/tex]
Answer:
-2(x - 2)2 = -8(7 + y)
Step-by-step explanation:
2(x - 2)2 = 8(7 + y)
(2x - 4)2 = 56 + y
4x - 8 = 56 + y
4x - 8 - 56 = y
4x - 64 = y
If option A
-2(x - 2)2 = -8(7 + y)
(-2x + 4)2 = - 56 - y
- 4x + 8 = - 56 - y
- 4x + 8 + 56 = - y
- 4x + 64 = - y
4x - 64 = y
(RIGHT)✔
Please help me understand
Answers
Answer:
2
Step-by-step explanation:
The scaled factor has to be 2 because 4*2=8. You can check 2 is the correct answer by doing 8/2, which is 4. The scaled factor has to be proportional so if one side of ABC was 2 but the same side on ABC prime or A’B’C’ was 10 it would not be proportional, not a scaled factor. Because 2*10 is 5, not 8. But it does not give any other side lengths so it is 4.
Subtract polynomials:
(-4x^3+5x^2-x+3)-5(x^4-2x^3+x^2)
Answers
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Answer:
-5x^4 +6x^3 -x +3
Step-by-step explanation:
First, eliminate parentheses.
(-4x^3+5x^2-x+3)-5(x^4-2x^3+x^2)
= -4x^3 +5x^2 -x +3 -5x^4 +10x^3 -5x^2
Then collect terms.
= -5x^4 +(-4+10)x^3 +(5 -5)x^2 -x +3
= -5x^4 +6x^3 -x +3
A number less 5 divided by 42
Answers
Answer:
It's 0 because if you do 42~4=10.5 and 42~3=14 and 42~2=21 and 42~1=42 and there all more then 5 but on the other hand 0 is less then 5
Step-by-step explanation:
A bag contains the following marbles: 10 black marbles, 6 blue marbles, 14 brown marbles, and 18 green marbles. What is the ratio of green marbles to black marbles? Express your ratio as a fraction or with a colon.
Answers
Answer:
18:6 or 3:1
Step-by-step explanation:
if max have six pies and six 6 apples and give 3 to his sis how many he got now
Answers
Answer: 9
Step-by-step explanation:
12-3=9
Answer:
If Max gave his sister apples, he would have six pies and 3 apples.
If Max gave his sister pies, he would have 3 pies and 6 apples
Step-by-step explanation:
6 - 3 = 3
if you remove 3 from 6 you have 3
Emma buys 9 bottles of pineapple juice at the corner store for a total cost of $10.62.
Assume each bottle of juice is the same price. If c represents the total cost in dollars
and cents of the juice for any number, j, of bottles of juice, write a proportional
equation for c in terms of j that matches the context.
Answers
$1.18
Step by step explanation :
9c = 10.62
c = 10.62/9
c = 1.18
dan wants to pout 90.94 grams of salt into a container. so far, he has poured 39.2 grams. how much more salt should dan pour ?
Answers
Answer: its 51.74
Step-by-step explanation: I just did it
less than a number
Х
A, 12-x
B. 12x
C. X + 12
D. X-12
Answers
Answer:
D) X-12
Step-by-step explanation:
imagine that X = 2 or any number less than 12
A) 12 - X = 12 - 2 = 10
B) 12X = 12 ×2 = 24
C) X + 12 = 2 + 12 = 14
D) X - 12 = 2 - 12 = -10
So, the smallest number is (D)
Hope it's help.
3r+(7+8)/(t-3)when r=4, s=3 and t=5
Answers
Answer:
19.5
Step-by-step explanation:
3r+(7+8)/(t-3)
3(4)+(15)/(5-3)
12+(15/2)
12+7.5
19.5
Find each product -1(9)
Answers
Answer:
-9
Step-by-step explanation:
-1×9. that is how it is
