Answer:
[tex]\boxed {\boxed {\sf 2 \ real \ solutions }}[/tex]
Step-by-step explanation:
The quadratic formula is:
[tex]{x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}}[/tex]
The discriminant of a quadratic is just the expression under the square root, or [tex]b^2-4ac[/tex]. This can tell us the number of solutions a quadratic has.
If the discriminant is:
Positive = 2 real solutions Equal to Zero = 1 real double/repeated solution Negative = 0 real solutions, but 2 imaginary solutionsOur quadratic equation has a discriminant of 5, which is positive. Therefore, it has 2 real solutions.
A marble is selected from a bag containing eight marbles numbered 1 to 8.
The number on the marble selected will be recorded as the outcome.
Consider the following events.
Event A: The marble selected has an odd number.
Event B: The marble selected has a number from 3 to 6.
Give the outcomes for each of the following events.
If there is more than one element in the set, separate them with commas.
(a) Event "A and B":
mm
(b) Event "A or B".
X
?
(C) The complement of the event B: {I}
Answer:
here you go
Step-by-step explanation:
7.
Find the range of f(x) = –2x – 5 for the domain {–2, –1, 1, 2}.
A. {–1, –3, 7, 9}
B. {1, 3, 5, 7}
C. {–1, –3, –7, –9}
D. {–1, –3, 3, 5}
Answer: C) [-1,-3,-7,-19]
Step-by-step explanation:
Range = {-2(-2) - 5, -2(-1) - 5, -2(1) - 5, -2(2) - 5} = {4 - 5, 2 - 5, -2 - 5, -4 - 5} = (-1, -3, -7, -9}
Answer:
-2(-2)-5= -1 -2(-1)-5=-3 -2(1)-5=-7 -2(2)-5=-9... A. {-1, -3, 7, 9}
Step-by-step explanation:
By substituting each value of the domain of x in the function and solving it we will get the range of the function for respective domain
The given function is :
f(x) = -2x - 5
For x = -2 , f(x) is:
f(-2) = (-2*-2) - 5 = 4 - 5 = -1
For x = -1, f(x) is :
f(-1) = (-2*-1) - 5 = 2 - 5 = -3
For x = 1 , f(x) is
f(1) = (-2*1) - 5 = -2 -5 = -7
For x = 2, f(x) is
f(2) = (-2*2) - 5 = -4 -5 = -9
The range is -1 , -3 , -7 , -9
Hope this helps ..!!
Thank you :)
what is the proportion of 3 over 7 =n over 28
- 7r - 3r - 8 = 24.
Answer:
24
Step-by-step explanation:
Which of the following shows the correct steps to find the value of
1
? (1 point)
83
O
83 = (43)3 = (4)
= 4
()() -
088=(23) =(2,394 = 2
O &$=(20) = (2+3)=
2+
= 16
О
164 = (82)4 = (8)
= 8
9514 1404 393
Answer:
b, d
Step-by-step explanation:
When you're taking the cube root, the thing you're taking the cube root of is best expressed as a cube.
You know that 2^3 = 8 and 3^3 = 27, so any other representation of 8 or 27 is irrelevant to the problem.
The appropriate choices are the second and fourth ones (B, and D).
For which equation is s=9 not the solution? A.s+6=15,B. 7+s=16 C.13-s=4 ,D.s-3=12
Answer: its D
Step-by-step explanation:
Answer: D♪ヽ(･ˇ∀ˇ･ゞ)
Step-by-step explanation:
Peter scored 27 out of 50 in a test. What percent was that? *
-13.5%
-27%
-50%
-54%
Answer:
54% for sure please give me brainliest
Answer:
54%
Step-by-step explanation:
27/50 = 54/100 (multiply the full score untill it is at 100, the use the same number it took for that and multiply the points)
Sam and Adam share some money in the ratio 2 : 5.
Adam got £12 more than Sam.
Work out how much money Sam received.
Answer:
£8
Step-by-step explanation:
A
Sam:Adam
2:5
3=£12
12÷3=4
1=4
4×2=8
sam=£8
Hello Miss!! I hope you are doing well.Ms.Sawsan are my answers correct here or is there something I need to change?
In systems by substitution what is y=x+8 and x+y=2
Answer:
x = -3
Step-by-step explanation:
y = x + 8 and x + y = 2
Using substitution, we know that y = x + 8, so:
x + y = 2
x + (x + 8) = 2
2x + 8 = 2
2x = -6
x = -3
Then we solve for y:
x + y = 2
-3 + y = 2
y = 2 + 3
y = 5
Miss Van invested some money by using the app e-trade. She tracks her
gains and losses using the app on her phone. Miss Van receives a daily
notification that updates her on all her transactions from the previous day.
This morning, her notification read as follows: Yesterday's investment
activity included a loss of $500, a gain of $740, and another gain of $120.
Log in now to see your current balance. Write an integer to represent the
highlighted box.
Answer:
$360
Step-by-step explanation:
Gains represents additions to her account while losses represent substractions
-$500
+740
+120 ________
$360
Find the length of AB.
00240°
AB = [? ]m
140°
8 m
B
Round your answer to the nearest hundredth.
Answer:
19.54 m
Step-by-step explanation:
[tex]l(\widehat {AB}) = \frac{ \theta}{360 \degree} \times 2 \pi r \\ \\l(\widehat {AB}) = \frac{140 \degree}{360 \degree} \times 2 \times 3.14 \times 8 \\ \\ l(\widehat {AB}) = \frac{7}{18} \times 2 \times 3.14 \times 8 \\ \\ l(\widehat {AB}) = \frac{351.68}{18} \\ \\ l(\widehat {AB}) = 19.5377778 \\ \\ l(\widehat {AB}) \approx 19.54 \: m[/tex]
Which of the following shapes is a convex nonagon?
OA)
OB)
OC)
OD)
It is asking for a convex nonagon, not a convex polygon. So in this case we are looking for a shape with 9 straight lines and 9 angles. Which means we can cross A out.
Now we need to look at which nonagon is a convex nonagon which means that we are looking for the shape having only interior angles measuring less than 180°. So this means that B and D can be crossed out.
Thus, the answer is C.
P.S. If you find my answer helpful, please mark me brainiest!
40 times 30 equals whatttttttt
Answer:
1200 is your awnser
Step-by-step explanation:
Is the product of greater or less than ? Is it
easier to compare the product to using the number
line or area model? Explain.
5
8
Answer:
3/5 x 5/8 is less 5/8
Step-by-step explanation:
3/5 x 5/8 = 15/40
Simply
15/40 = 3/8
•
5/8 > 3/8
Jose brought 9 pounds of rice for $4. How many pounds of rice did he get per dollar?
Answer:
1.5 pound ever dollar
Step-by-step explanation:
just calculate
Answer:
2.25 answer
Step-by-step explanation:
9÷4=2.25answer thanks
Helllppppppppppp pllzlzlzllzlz check the picc
Answer:
[tex]Rx=1(p) = (4,7)[/tex]
Step-by-step explanation:
he given point P has coordinates, [tex](-2,7)[/tex] We want to find the image of this point, after a reflection in the line [tex]x=1[/tex]
What is the slope of this line?
Answer:
3/4
Step-by-step explanation:
Gradient=6/8=3/4
I’m studying and I have trouble with this problem and I need an explanation. Please help me! Thank you
Answer:
Step-by-step explanation:
Im going to assume they want x+108.
You have 2 expressions sitting on a line, so when added to each other they must = 180
So add and set up an equality
x+108+x+78=180
Combine like terms
2x+186=180
Solve
2x+186=180
-180 -180
2x+6=0
-6 -6
2x=-6
________
2
x=-3
Substitute X for -3
-3+108=
105.
urgent solve 5( x- 2 )=35
Step-by-step explanation:
5x-10=35
5x=35+10
5x=45
5x/5=45/5
x=9
3. Find the height of rectangle with area (2x^2-9x+9) ft^2 and width (2x-3) ft
Answer:
The height of the area is (x - 3) ft.
Step-by-step explanation:
You can do this a few ways. You could use long division to divide the area by the width, or you could just factor the area, which is guaranteed to have the width as a factor, leaving you with the height.
Let's go with factoring, as that's probably what this question is intended as:
[tex]= \frac{2x^2 - 9x + 9}{2x - 3} \\\\= \frac{2x^2 - 6x - 3x + 9}{2x - 3} \\\\= \frac{2x(x - 3) - 3(x - 3)}{2x - 3} \\\\= \frac{(2x - 3)(x - 3)}{2x - 3} \\\\= x - 3[/tex]
ANSWER THIS PLZZZZZZ
Answer:
dude all you have to do is add it up its A or B
Answer:
E
Step-by-step explanation:
What is x?
-4x-2 /3=(-6)
Answer:
4/3
Step-by-step explanation:
Answer:
x= 4
Step-by-step explanation:
-4x-2 /3=(-6)
-4x-2= 3 (-6)
-4x-2=-18
-4x=-18+2
-4x=-16
x=-16/-4 = 16/4 = 4
In which table is y a linear function of x?
X
0
1
4
5
A
8
y
0
5
96
-9
-12
X
0
1
2.
3
4
B В
y
0
7
12
15
16
x
1
0
1
M
©
у
6
8
10
12
14
х
1
1
N
3
4
5
D
32
16
у
4
8
2.
Answer:
ur answer should be C. But I'm not really sure..
The table in which y is a linear function of x is; Choice C
Linear functionsAccording to the question;
We are required to identify in what table y is a linear function of x.The slope of a linear function is always constant.
Hence, By observing the table in Choice C;
Slope = (8-6)/(0-(-1)) = (10-8)/(1-0) = 2.
Hence, since slope of the function is constant, the required table is: Choice C.
Read more on linear function;
https://brainly.com/question/24502219
simplify this please (45)(26)
Answer:
1170
Step-by-step explanation:
45 times 26
Answer:
1170
45x26=1170
HELP ILL MARK YOU BRAINLIST
XYZ will be translated so that the coordinates of X are (5,11)
Answer: B
Step-by-step explanation:
Help!
Which functions graph is shown below?
Answer:
Sin x so A
Step-by-step explanation:
Please give me brainliest pls. Im begging you I helped.
plz answer. Its urgent. thanks
Answer:
[tex] a = \dfrac{5}{18} [/tex]
[tex]b = -\dfrac{1}{18}[/tex]
Step-by-step explanation:
You need to rationalize the fraction.
[tex] \dfrac{1}{5 + \sqrt{7}} = a + b\sqrt{7} [/tex]
[tex] \dfrac{1}{5 + \sqrt{7}} \times \dfrac{5 - \sqrt{7}}{5 - \sqrt{7}} = a + b\sqrt{7} [/tex]
[tex] \dfrac{5 - \sqrt{7}}{25 - 7} = a + b\sqrt{7} [/tex]
[tex] \dfrac{5 - \sqrt{7}}{18} = a + b\sqrt{7} [/tex]
[tex] \dfrac{5}{18} - \dfrac{1}{18}\sqrt{7} = a + b\sqrt{7} [/tex]
[tex] a = \dfrac{5}{18} [/tex]
[tex]b = -\dfrac{1}{18}[/tex]
Very confused on how to get the inside variables
