Answer:
-1 ± 3i√6
Step-by-step explanation:
Please write this quadratic equation as follows: x^2 + 2x + 7 = 21. The " ^ " indicates exponentiation.
The coefficients of this quadratic are 1, 2, 7.
Thus, the "discriminant" b^2 - 4(a)(c) is (2)^2 - 4(1)(7), or 4 - 28, or -24.
Because the discriminant is negative, this quadratic has two different complex roots:
-b ± √[ discriminant ] -2 ± 2i√6
x = --------------------------------- = ----------------- = -1 ± 3i√6
2a 2
+7z+12
x +4x+3
+4x+3
Multiply:
Answer:
The answer will be 7z+20x+6
First combine like terms: 7z+18+9x then you can’t really multiply it
Janitors at Strickland High School empty 25 trash cans each day. The design of
each trash can is shown below.
Height- 4.5 inches
Length- 3 inches
Width- 2 inches
What is the total volume of trash that the janitors empty each day?
Round to the nearest tenth and don't forget to include units. The tick mark
on the numbers represents inches.
Answer: 675 cubic inches of trash
Step-by-step explanation:
Hi, to answer this question, first, we have to calculate the volume of each trash can :
Volume of a rectangular prism: width x length x height
Replacing with the values given:
V = 2 x 3 x 4.5= 27 cubic inches
Since there are 25 trash cans every day, we have to multiply the volume of each one by 25.
27 x 25 =675 cubic inches of trash
Feel free to ask for more if needed or if you did not understand something.
ΔQRS is an isosceles triangle. What is the length of RT¯¯¯¯¯¯ ? Round to the nearest hundredth. Enter your answer in the
Answer:
RT = 9.200 cm
Step-by-step explanation:
[tex]RT = \sqrt{ {11}^{2} - {6}^{2} } \\ RT = \sqrt{121 - 36} \\ RT = \sqrt{85} \\ RT = 9.219 \: cm \\ RT = 9.200 \: cm[/tex]
Please answer. Question in picture.
Ans
Step-by-step explanation:
Which measurement shows how much space is inside a rectangular prism?
A.
faces
B.
area
C.
perimeter
D.
volume
Answer:
D: volume
Step-by-step explanation:
A circle has a diameter of 12 inches.
12 in.
What is the area of the shaded sections? Use 3.14 fors and round to the nearest hundredth.
Answer:
113.04 sq. in.
Step-by-step explanation:
will make bianleast
Find the perimeter of the square.
64 ft
16 ft
8 ft
32 ft
Answer:
32 ft
Step-by-step explanation:
The perimeter is basically the area of the outside of a shape. To calculate this, you would add up all the sides together and get the answer.
8 + 8 + 8 + 8=32 or you can just do 8*4 which is also 32
So, the answer is 32
Which of the following closed sets of ordered pairs is not a function?
A
{(3, 2), (4, 6), (5, 8)}
B
{(2, 1), (3, 2), (4, 3)}
C
{(1, 2), (2, 5), (1, 3)}
D
{(2, 4), (5, 3), (4, 1)}
Answer:
C
Step-by-step explanation:
7. The original price of a bicycle is $700. It is discounted by 50%. What is the sales price of
the bike?
Answer:
$350.
Step-by-step explanation:
50% translates over to 1/2, so you take the price of $700 and multiply it by 1/2. You then get $350, which is half of $700.
While shopping for clothes, Daniel spent $34 less than 3 times what Jaclyn spent. Daniel spent $14. Write and solve an equation to find how much Jaclyn spent. Let x represent how much Jaclyn spent.
___x - ___ = ___
Jaclyn spent $____
Answer: Jaclyn spent $48
Step-by-step explanation:
3x - 34 = 14
3x = 14+34
X = 48/3 = 16
Answer:
spent 48$
Step-by-step explanation:
How many terms does the expression 7x - 2y + 5 have? A. 3 B. 2 C. 1 D. 0
Answer: A. 3
Step-by-step explanation: You can't put x and y together. There are two different variables. Then the 5, is just can't add together with another number because the numbers have a variable with it.
Please mark me brainliest bc one more to get a higher rank :)
Answer:
A. 3
Step-by-step explanation:
7x is a term
-2y is a term
5 is a term
So there are 3 terms
I hope this helpsStarting at origin. do 4 spaces down and then 2 spaces to the right
which is it
A. (-4,2) B. (-4, -2) C. (2, -4) D. (-2, -4)
Answer:
A. (-4,2)
Step-by-step explanation:
Please answer this question and i will mark you brainliest.
Answer:
4 altogether
0,1 + 1, 1 = 1 RA
0,1 + 2,1 = 1 RA
0.2 +1, 2 = 1 RA
0,2 +2,2 = 1 RA
Step-by-step explanation:
i will mark brainliesttt!
Answer:
d = 52
Step-by-step explanation:
The two angles form a straight line so they are supplementary
Supplementary angles add to 180
d+128 = 180
Subtract 128 from each side
d+128-128 = 180-128
d = 52
Answer:
52
Step-by-step explanation:
so to solve this one, you have to get the value of d.
for this you need to first subtract the given angle from 180.
180-128=52
that is the value of d :) if u need any more help post a question, ill follow you!
WILL GIVE BRAINLIEST
Joe has 1/2 of a yard of fabric that needs to be cut into thirds. What is the fractional part of each third?
Answer:
1/6 of a yard
Step-by-step explanation:
1/2 of a yard x 1/3 of a yard = 1/6
When you find the surface area of a cube, you ________ the length of the cube and multiply by 6.
A-square
B-add
C-cube
D-divide
Answer:
A-square
Step-by-step explanation:
The formula for the surface area of a cube is:
SA = 6a²
where a is the length of the cube
Janet saved $3500 in 2007. If each year after
this she saves $750 more than the year before,
how much will she save in 2012?
(A) $5750
(B) $6500
(C) $7250
(D) $8000
(E) $8750
Answer:
7250
Step-by-step explanation:
The equation would be as follows
3500+750x=y
Between 2012 and 2007, there are 5 years, thus x=5
3500+750(5)=7250
help meeeeeee please :(
Step-by-step explanation:
As the triangle is right angled :
sin of angle = 19/24
angle = 52.3⁰
Answer:
52,3°
Step-by-step explanation:
[tex]sin( \alpha ) = \frac{19}{24} [/tex]
[tex] \alpha = 52.3[/tex]
A mother has one allele for color blindness and one allele for normal vision
What is the probability that her gamete will have the allele for color
blindness?
A. 0%
O B. 25%
C. 75%
D. 50%
Answer:
i say 50%
Step-by-step explanation:
if there is an outcome of 2
then there is a 50% chance she either has normal visions or color blindness
Answer:D
Step-by-step explanation:
The standard configuration for an Arizona license plate is 3 digits (0 - 9) followed by 3 letters (of 26). If you can not repeat digits or letters, how many plates (NO COMMAS NEEDED) can be made?
Answer:
11232000 plates
Step-by-step explanation:
To find the number of plates that can be made, we just need to check for each space filled how many possible values it can take:
We have 3 digits that can not repeat, so the first digit has 10 possible values (all digits from 0 to 9), the second digit has 9 possible values (as one is already taken) and the third digit has 8 possible values.
For the letters, the first one has 26 possible values, the second one has 25 and the third one has 24.
So the number of different plates is the product of all these possibilities for each digit and letter:
10 * 9 * 8 * 26 * 25 * 24 = 11232000 plates
Solve -4x + 2(5x - 6) + 2x = 44 for x
The value of X is 7.
Look at the attached picture
Hope it will help you
Good luck on your assignment
Answer:
X = 7
-4x + 2(5x - 6) + 2x = 44
GROUP LIKE TERMS
-4x + 2x = -2x
-2x + 2(5x -6) = 44
-2x + 10x - 12 = 44
8x - 12 = 44
ADD 12 ON BOTH SIDES
8x = 56
DIVIDE 8 ON BOTH SIDES
x = 7
What is the volume of the cone? Cone
Answer: done is five
Step-by-step explanation:
There is five because if you can tell what is the l s what in it
Answer:
V=1/3 Bh
Step-by-step explanation:
Which of the following is a benefit of contributing to a retirement account?
taxable income is reduced
Answer: taxable income is reduced
Step-by-step explanation:
25 points and brainly please help quick
Doug records how many miles and how long he rides his bike each day on a scatter plot.
Doug analyzes his data on the scatter plot and concludes that the more time he rides his bike, the slower his speed is. In two or more complete sentences, explain why or why not it is possible for Doug to make his conclusion based on his data.
Answer:
the plot shows he had a speed of 0.20 miles but the longer he travels the slower he gets, so his last speed is 0.17 miles a minute
Step-by-step explanation:
The ordered pairs (12, 32), (x, 40), (18, 48), (21, y) represent a proportional relationship. Find the values of x and y. Select the two correct answers.
x = 14
x = 15
x = 17
y = 62
y = 56
y = 78
Answer:
This is the closest thing I could get
x=15
Y=56
Step-by-step explanation:
The difference between 32 and 12 is 20
So the difference between x and 40 is 25
Between 48 and 18 its 30
And last between 21 and y is 35
Please answer CORRECTLY , Will mark brainliest !!!!!!
Answer:
answer c
Step-by-step explanation:
khan
Answer:
Step-by-step explanation:
C
Tara works at an electronics store as a salesperson. She receives a weekly salary of $375 plus she makes commission in the amount of 5% of what she sells. Which of the following represents her total earnings, E, in terms of s, the number of electronics she sells, not including any taxes?
A.
E + 5s = 375
B.
E = 375 + 5s
C.
E + 0.05s = 375
D.
E = 375 + 0.05s
Answer:
D.
E = 375 + 0.05s
Step-by-step explanation:
if 3/x=5/y then what is the value of y/x?
plss help
Answer:
Step-by-step explanation:
3/x=5/y
3y/x=5
y/x=5/3
Completed the table of values using the function y=4x-3. Graph the function on the coordinate plane.
Answer:
Step-by-step explanation:
substitue values in the table into the equation.
x = 2, then y = 4(2)-3 =>
y= 5
y = -3, then -3 = 4x-3 =>
x = 0
x = -1, then y = 4(-1) - 3 =>
y = -7
x = 3, then y = 4(3) -3 =>
y = 9
y = 1, then 1 = 4x - 3 =>
x = 4
now plot all of these points and create a line from them