Step-by-step explanation:
xy = -40 and x + y = 18
=> x(18 - x) = -40
=> 18x - x² = -40
=> x² - 18x - 40 = 0
=> (x - 20)(x + 2) = 0
=> x = 20 or x = -2.
The two numbers 20 and -2.
Answer:
let the numbers be x and y
[tex]xy = - 40 - - - (i) \\ x + y = 18 - - - (ii) \\ from \: (ii) \\ x = 18 - y \\ substitute \: for \: x \: in \: (i) \\ (18 - y)y = - 40 \\ 18y - {y}^{2} = - 40 \\ {y}^{2} - 18y - 40 = 0 \\ use \: the \: quadratic \: equation \: to \: get \: y \\ and \: y \: will \: give \: u \: x[/tex]
x = 20
hence y = 18-20
y = -2
or
x = -2
hence y = 18-(-2)
y = 20
The numbers are -2 and 20
29.8 ft
what’s the area
Answer:
The area is 888.04 square ft
Find the slope of the line graphed below.
Answer:
Slope: -3/5
Step-by-step explanation:
PLEASE HELP I NEED IT I WILL MARK BRAINLIEST
Answer:
y = (1/12)x^2
Step-by-step explanation:
The vertex of this parabola is halfway between (0, 3) and the directrix, y = -3; that is, it's at (0, 0).
The applicable equation for this vertical parabola is 4py = x^2, where p is the distance between the vertex and the focus. Here that distance is p = 3.
Thus, 4py = x^2 becomes 4(3)y = x^2, or 12y = x^2, or y = (1/12)x^2.
Have a good day!
-Millie
Which is the constant of proportionality for the relationship shown in the graph?
Answer:
COP: 2X
Step-by-step explanation:
K= Y/X
K= 4/2
K= 8/4
K= 12/6
K=16/8
Solve for
x
2
(
x
−
7
)
=
x
−
2
The local newspaper has letters to the editor from 10 people. If this number represents 5% of all the newspaper's readers, how many readers does the newspaper have?
The newspaper has ___ readers.
Answer:
200 readers
Step-by-step explanation:
question is: 5% of what number is 10
is = percent
of 100
is = 10
of = unknown (call is 'n')
5% = 5/100
10 = 5
x 100
now, cross-multiply: 5x = 1000
divide each side by 5
x = 200
What is the solution to the system of equations? Two-thirds x minus one-third y = negative 2 Negative 2 x + y = negative 6 There is no solution. There are infinitely many solutions. There is only one solution, (2, –2). There is only one solution, (–2, –10).
Answer:
there no solution
Step-by-step explanation:
Answer:
b
Step-by-step explanation:
4.139=4+ ?/100+?/1000
Please solve it I will give you 30 points
Answer:
1. (2x^2+x-1)
Step-by-step explanation:
expanding (2x^2-1)^2. multiplying (x-2) (1-2x)
= 4x^2-4x+1. = x-2x^2-2+4x
= -2x^2+5x-2
(4x^2-4x+1-2x^2+5x-2)
=2x^2+x-1
Answer:
1.) (2x - 1)(x + 1)
2.) a = 6 ; b = -1
4.a.) x = all rational numbers excluding (-2÷3)
4.b.) x = -1
4.c.) Yes. x = 1÷2
Step-by-step explanation:
E(x) = (2x - 1)² + (x - 2)(1 - 2x) F(x) = ax²-bx-2
F(1) = 5 ; F(-2) = 20
a-b=7 ; 4a+2b=22
3.Answer) Q(x) = 6x² + x - 2
= 6x² + 4x - 3x - 2
= (3x + 2)×(2x - 1)
Hence verified!
P(x) = E(x) ÷ Q(x)
= (x + 1)÷(3x + 2)
Here, x belongs to,
[tex]( - \infty \: to \: - 2 \div 3) union( - 2 \div 3 \: to \: \infty )[/tex]
Means, except x = -2÷3 , all real numbers are valid excluding complex numbers.
P(x) = (x + 1)÷(3x +2) = 0
= > x = -1
For each offspring genotype in the Punnett square you just completed, determine the phenotype. In other words, what is the predicted fur color and eye color of the offspring? Using your Punnett square from the last step, fill in the predicted fraction for each phenotype in the data table below. (other ppl got it wrong, so here is the answer)
answer:
(predicted fractions)
16/16
0/16
0/16
0/16
(predicted percentage)
100%
0%
0%
0%
Answer:
(predicted fractions)
16/16
0/16
0/16
0/16
(predicted percentage)
100%
0%
0%
0%
1. Which expressions are equivalent
to 16?
Select each correct expression.
Answer:
1^16
8^2
16^1
Step-by-step explanation:
These are the answers because they equal up to 16 like the question asks.
1x16= 16 (1^16)
8x8= 16 (8^2)
16x1= 16 (16^1)
Could someone pls help me if you know it thank you!:)
Answer:
30
Step-by-step explanation:
The full pie chart will equal 100%
So we can add all the percentages together and then subtract that percentage from 100 and whatever's left is the parentage that they attend school.
12+3+5+10+5+35
70
100-70
30
They spend 30% attending school
Don't be afraid to reach out for further assistance. Hope this helps!
i have no idea what the answer, please help me
Answer:
43°
Step-by-step explanation:
-the interior angle of a triangle always adds up to 180°
- angles that form a straight line always adds up to 180°
- the angle at 75° has the angle of 105° to add up to 180°
- the triangle needs a full degree of 180, but only affs up to 137° (105° + 32°) so you have to subtract the 137° from the total amount you need(180°) which gives you the answer of 43°
Answer:
Step-by-step explanation:
it cant be 73° then it would look about the same size as 75°
and it cant be 15° cause it would look smaller than 32°.
so in my Opinion it looks like it would be 43°.
sorry if its wrong
I WILL BRAINLIEST !!!
Mike is mixing paint for his walls. He mixes
1/6 gallon blue paint and
4/9 gallon green paint in a large container.
What fraction represents the total amount of paint Mike mixes?
Answer: 11/18
=======================================================
Explanation:
We need to add the fractions, but first we need to get each fraction to have the LCD (lowest common denominator) of 18
18 is the LCM of the denominators 6 and 9
The fraction 1/6 turns into 3/18 when multiplying top and bottom by 3
The fraction 4/9 turns into 8/18 after multiplying top and bottom by 2
Therefore,
(1/6) + (4/9) = (3/18) + (8/18) = (3+8)/18 = 11/18
So Mike has a total of 11/18 of a gallon of paint when combining the two given amounts 1/6 a gallon of blue paint and 4/9 of a gallon of green paint.
How many solutions does the system have?
y=3x-1
y=-2x+4
Answer:
This system has one answer.
Step-by-step explanation:
This system only has one answer which are: x=1 y=2
Hope this helped! :)
Answer:
(y,x) =(14,5)
Step-by-step explanation:
im in 10th grade
What is the slope of the line that passes through the following g points
(6,3) and (4,-2)
Answer:
2.5
Step-by-step explanation:
The slope of the line is; [tex]\frac{rise}{run}[/tex] and can be found using the formula;
[tex]\frac{y_{2} - y_{1}}{x_{2}-x_{1}}[/tex]
Given the points;
( 6, 3 ) and ( 4, -2)
Substitute the points in and solve;
[tex]\frac{(-2) - (3)}{(4) - (6)}[/tex]
[tex]\frac{-5}{-2}\\\\\frac{5}{2}\\\\= 2.5[/tex]
You just found out you have to have a cavity filled! UGH! The dentist
office informs you that a filling usually costs $150, but that sometimes it
can vary but that it will only vary AT MOST $20. What is the range of cost
you can expect to pay for your filling?
Answer:
It could be anywhere from $130-$170
Help me do this math problem
C= 59(F−32)
Answer:
c=59f-1888
f=[tex]\frac{c}{59}+32[/tex]
Step-by-step explanation:
Hope this helps!
Anyone know the answer?
Answer:
4.5
Step-by-step explanation:
sean has to face a big problem but he becomes stronger as a result which saying best summarizes the change in Sean?
A.A switch in tie saves nine
B.be careful what you wish for
C.pride comes before a fall
D.every cloud has a silver lining
Please help me I WILL give brainless <33
Answer: D. every cloud has a silver lining
The cloud represents a dark, scary, or sad moment. This is in contrast to the sun which metaphorically represents energy and happiness. The cloud sometimes covers up the sun to cover up those happy moments so to speak.
Despite the cloud being present, there's a silver lining to the cloud which represents some positive aspect a person didn't expect to happen. In this case, the problem allows Sean to get stronger. So this is an opportunity for his growth.
A dump truck bar 1/3 of a ton of rocks on the 1st beat trip when half of a ton on the 2nd trip and forfeits of a tone on the 3rd trip what was the total way of the rock.
Answer: 1/30
Step-by-step explanation:
Here's the correct question:
A dump truck brought 1⁄3 of a ton of rock on the first trip, 1⁄2 of a ton on the second trip, but on the third trip, had to take back 4⁄5 of a ton. What was the total weight of the rock left at the construction site?
To calculate the the total weight of the rock left at the construction site goes thus:
= 1/3 + 1/2 - 4/5
The lowest common multiple of 3,2 and 5 is 30. Therefore, we'll make the fractions have a common denominator.
= 1/3 + 1/2 - 4/5
= 10/30 + 15/30 - 24/30.
= 1/30
helpppppppppppppppppp
Simplify each of the expressions below. Which of the expressions have a value between 0 and 10? Select all that apply.
Answer:
A and B
Step-by-step explanation:
A euqlas 4, B equals 5, c is -3 and d is -11
NEED HELP ASAP!!!
Carlos and his family are driving to California for vacation. The trip is 1,146 miles and they drive at an average speed of 56 mph. Which equation would give the number of miles remaining until they reach their destination, M, in terms of h, the number of hours they have driven? А. M= 1,146 + 56h
B. M= 56 - 1,146h
C. M= 56 + 1,146h
D. M= 1,146 - 56h
Answer:
D. M = 1,146 - 56h
Step-by-step explanation:
I beleive that this answer is the most reasonable because we arent adding miles to the trip we are taking away. Also subtracting from 56 would result in a negative answer and that really doen't make sense because they still have more miles to travel before they reach their destination.
Pls help and show workings
When building a car, you can choose from 3 colors, 3 interiors, 3 sound systems, 3 kinds of tires, and 3 seat coverings. How many combinations are possible if you are making two distinct cars?
anyone know this? cuz i'm confused
Answer:
y =37
x=12
z=131
Step-by-step explanation:
The angles of the left triangle are 59, 84 , y
They sum to 180
59+ 84+ y = 180
143 +y = 180
y = 180-143
y =37
The angles of the right triangle are 104,64,x
They sum to 180
104+64+x
168+x=180
x = 180-168
x=12
The angles of the middle triangle are x,y,z
They sum to 180
x+y+z
12+37+z = 180
49+z =180
z = 180-z
z=131
You know that the total measure of the angles in a triangle is 180 degrees.
You can use this to find angles x and y.
The angles of one of the triangles are x, 104, and 64. This means x would be 12.
104+64+x = 180
x = 180-104-64
x = 12
Use this same method to find y. The angles of the triangle y is in are 84, 59, and y. This means y is 37.
84+59+y = 180
y = 180-84-59
y = 37
Now you have x and y. The angles x, y, and z share one triangle. You can use this to find z.
x+y+z = 180
You know that x is 12 and y is 37.
12+37+z = 180
z = 180-12-37
z = 131
So...
x = 12
y = 37
z = 131
What is the general form of the equation 2x+3y=9
A room in the shape of a rectangular prism measures 15 feet by a feet by 12 feet. Write a simplified expression for the volume (in cubic feet) of th
room
Answer:
5x3
Step-by-step explanation:
Andre shot three arrows and they landed at (-5,4),(-8,7),and(1,6). What is his Total score? Explain your reasoning
I've attached the graph showing the colored regions of the archery target.
The scores for the colored regions are;
Yellow: 10 points
Red: 8 points
Blue: 6 points
Green: 4 points
White: 2 points
Answer:
16
Step-by-step explanation:
From the graph, At coordinate of (-5,4), the colored region is blue which means a score of 6 points.
From the graph, At coordinates of (-8,7), the colored region is red which means a score of 8 points
From the graph, At coordinates of (1,6), the colored region is white which means a score of 2 points
Thus, total score = 6 + 8 + 2 = 16
Step-by-step explanation:
Here are the scores for landing an arrow in the colored regions of the archery target.
Yellow: 10 points
Red: 8 points
Blue: 6 points
Green: 4 points
White: 2 points
Andre shot three arrows and they landed at (-5,4),(-8,7),and(1,6). What is his Total score? Explain your reasoning
A. 14
B.16
C. 5
D 12
Answer: the answer is A. 14 i took the test and i got it wrong because i put B. 16 because of the answers of this question but the correct answer is A. 14
please correct me if i am wrong