Answers
Answer:
32
Step-by-step explanation:
negative times negative = positive
Related Questions
(x + y)2 = 64 et x y = 15, alors x2 + y2
Answers
Answer:
[tex]x^2+y^2=34[/tex]
Step-by-step explanation:
Expand [tex](x+y)^2[/tex].
[tex](x+y)^2=x^2+2xy+y^2[/tex]
[tex]x^2+2xy+y^2=64[/tex]
Substitute 15 for xy.
[tex]x^2+2(15)+y^2=64\\\\x^2+30+y^2=64\\\\x^2+y^2=34[/tex]
A hummingbird lives in a nest that is 7 meters high in a tree. The hummingbird flies 10 meters to get from its nest to a flower on the ground. How far is the flower from the base of the tree? If necessary, round to the nearest tenth.
Answers
Answer:
3 meters
Step-by-step explanation:
if the nest is 7 meters up bit the bird flew 10 meters u subtract 10-7 and get 3 meters
Select the correct answer.
Quadrilateral ABCD is reflected across the x-axis and then reflect across the y-axis to form quadrilateral A'B'C'D'. If the coordinates of vertex A
are (-7,3), what are the coordinates of vertex A?
OA (7,3)
OB. (-7, -3)
Oc. (7.-3)
OD. (-7,3)
OE. (3.7)
Answers
Answer: The answer would be (7,-3)
Step-by-step explanation: You can always graph it on graph paper
Mr. Tan's rectangular swimming pool has an area of (81x2 - 144y2) square feet. What are the dimensions of his pool?
Answers
Answer:
The pool dimensions are thus (9x - 12y)(9x + 12y)
Step-by-step explanation:
(81x^2 - 144y^2) is the difference of two squares. Note that you must indicate exponentiation with " ^ ."
Factoring the difference of two squares: a^2 - b^2 = (a - b)(a + b)
Thus, (81x^2 - 144y^2) =
The pool dimensions are thus (9x - 12y)(9x + 12y)
Area of rectangle is Length times of Breadth. The pool dimensions are (9x - 12y) and (9x + 12y) when area of rectangular swimming pool is (81x2 - 144y2)
area of Mr. Tan's rectangular swimming pool is (81x^2 - 144y^2), we need to find the area of rectangle.
What is area of rectangle?Area of rectangle= Length*Breadth
The given area of Mr. Tan's rectangular swimming pool is (81x^2 - 144y^2),
(81x^2 - 144y^2)=Length * Breadth
We know that (a+b)(a-b)=a^2-b^2
So,
The factors of (9x^2-12y^2) is (9x+12y) and (9x-12y)
(9x^2-12y^2)=(9x+12y)(9x-12y)
=Length * Breadth
where length and breadth are two dimensions of rectangle
Therefore (9x+12y) and (9x-12y) are two dimensions of rectangle.
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To go to the dog beach, it costs $3 plus $2 per dog l. Which equation shows this situation, where x represents the number of dogs?
Answers
Answer:
the equation would look like x = 2x + 3
Step-by-step explanation:
Answer:
y=2x=3
Step-by-step explanation:
Pls help me with this questions
Answers
Answer:
20 < x < 40
Step-by-step explanation:
16 < x - 4 < 36 ( add 4 to each interval )
20 < x < 40
Simplify the expression:
9-3(5-4x)= ______
Use distributive property
_________________________
Please help ASAP-due tonight. I would be so grateful!
Answers
= -6 + 12X
Answer:
[tex]\boxed{\sf{-6+12x}}[/tex]
Step-by-step explanation:
Use a distributive property.
Distributive property:
⇒ A(B+C)=AB+AC
9-3(5-4x)
-3(5-4x)
Expand by multiplying.
-3*5=-15
-3*4x=12x
Rewrite the problem down.
-15+12x
9-15+12x
Solve with a order of operations.
PEMDAS stands for:
ParenthesisExponentsMultiplyDivideAddSubtractFirst, subtract.
9-15=-6
Rewrite the problem down.
= -6x+12
Therefore, the correct answer is -6x+12.I hope this helps you! Let me know if my answer is wrong or not.
________ sampling is the sampling method that is not based on chance or randomness but based on an inherently biased selection process.
Answers
Non-probability sampling is the sampling method that is not based on chance or randomness but based on an inherently biased selection process.
What is Non-probability sampling?Non-probability sampling is known to be a type of sampling method where the researcher often selects samples using subjective judgment instead of random selection.
This type of sampling do not make use of randomness and as such it is known to a less stringent method of sampling. IT is one that is based on the expertise of the researchers.
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Graph the system of equations.
f(x)=x^2−5x+7
g(x)=2x+1
Which statements are true about the solutions to the system of equations?
Select each correct answer.
The x-coordinate of a solution to the system of equations is 1.
The y-coordinate of a solution to the system of equations is 3.
The x-coordinate of a solution to the system of equation is 3.
An ordered pair that is a solution to the system of equations lies on the y-axis.
An ordered pair that is a solution to the system of equations lies in Quadrant III.
Both ordered pairs that are solutions to the system of equations are in Quadrant I.
Answers
We need to graph them first
Both attachedSolutions are
(1,3)(6,13)So
Option A,B,F are correct
For Future Refernce-
The Answers
The x-coordinate of a solution to the system of equations is 1.
Both ordered pairs that are solutions to the system of equations are in Quadrant I.
The y-coordinate of a solution to the system of equations is 3.
(source- k-12 Algebra 1 Checkpoint.)
A softball team hopes to win at least 3 games
for every 2 lost during the season. If there are
45 games scheduled, how many games can the
team lose and still achieve its goal?
Answers
Answer:
y=27
x=18
Step-by-step explanation:
x-games won
y-games lost
x+y=45
3x=2y
x=45-y
3(45-y)=2y
135-3y=2y
135=3y+2y
135=5y
y=27
x=(45-27)
x=18
Which set of numbers does NOT describe the side lengths of a right
triangle?
F 7, 24, 25
G 9, 40, 41
H 12, 35, 37
J 15, 18, 23
Answers
Answer: J
Step-by-step explanation:
Just substitute each of the sets into the Pythagorean Theorem - only J doesn't work.
A group of students collected old newspapers for a recycling project. The date shows the mass, in kilograms, of old newspapers collected by each student. What percent of students collected between 49 kilograms and 98 kilograms of newspapers?
Answers
The percentage of students who collected more than 49kg and less than 98kg of old newspapers is 54.54%
How to calculate the percentage of students who collected more than 49kg and less than 98kg?
To calculate the percentage of students who collected between 49kg and 98kg of old newspapers we must perform the following operations:
We must count how many students are in the range of 49kg to 98kg of old newspapers: 12 students out of 22 students.
100 ÷ 22 = 4.54%4.54 × 12 = 54.54%So, those 12 students are equivalent to 54.54% of students.
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Please help me and show how you got the answer
Simplify this expression 7a^2 - 7b^2
Answers
Answer:
7(a+b)(a-b)
Step-by-step explanation:
7a² - 7b²
= 7(a²-b²)
= 7 (a² + b²) (a² - b²)
Jack and Jill each planted flowers in their garden. Jack spent $41 on 4 daylilies and 7 roses Jill spent
$81 on 12 daylilies and 7 roses.
How much do the daylilies cost?
How much do the roses cost?
Jack and Jill added tulips to their garden. Jack added 10 tulips to bring his total to $51. Jill added 8 tulips
to her garden to bring her total to $89. Their friend Tanya also decided to plant a garden. She spent $71
on 4 daylilies, 14 roses, and 9 tulips.
How much to tulips cost?
Answers
Answer:
the daylilies cost: $5
The roses cost:$3
The tulips cost:$1
Step-by-step explanation:
Which option shows cos Ø?
Answers
sohcahtoa
cah
adjacent over hypotenuse
5/29
What single percentage change is equivalent to a 12% increase followed by a 14% decrease?
Answers
Answer:
3.68% decrease
Step-by-step explanation:
12% increase = 112% of the original value
112% as a decimal = 112/100 = 1.12
14% decrease = 100% - 14% = 86% of the original value
86% as a decimal = 86/100 = 0.86
Therefore, if you increase the number n by 12% and then decrease by 14%:
n × 1.12 × 0.86 = n × 0.9632
0.9632 as a percentage = 0.9632 × 100 = 96.32%
Therefore, the overall percentage change is 100% - 96.32% = 3.68% decrease
Pls help! I'm offering 20 points!
Answers
Answer:
Step-by-step explanation:
10x1
15x2
8x3
how do u work out 11x=24+8x
Answers
Answer:
x = 8
Step-by-step explanation:
First: Subtract 8x from both sides
You will be left with 3x = 24
then divide 3 from both sodes
you will be left with x=8
Jolon used the slope-intercept form to write the equation of a line with slope 3 that passes through the point (5, –2). His work is shown below.
Step 1: Negative 2 = 3 (5) + b
Step 2: negative 2 = 15 + b
Step 3: Negative 2 + 15 = 15 + 15 + b
Step 4: Negative 13 = b
Step 5: y = 3x – 13
Analyze the steps. In which step did the Jolon make an error?
He switched the x- and y- values in step 1.
He multiplied incorrectly in step 2.
He added 15 to both sides in step 3.
He forgot to add the b-value in step 5.
Answers
Jolon’s mistake was that he added 15 to both sides in step 3.
Explanation:
To cancel something out on one side of the equation, we would do the opposite of what it’s sign is. If it’s positive, we subtract. If it’s negative, we add.
In Jolon’s case here, 15 was positive, which means the correct thing to do is to subtract 15 from both sides. He added instead, which was incorrect.
I hope this helps! Please comment if you have any questions.
Answer:
c
Step-by-step explanation:
I dont get how to dont get how to do this, teacher went way to fast
Answers
Slope means m
1. AB = Slope is 3/4, CD = Slope is 0
2. AB = Slope is 2/5, CD = Slope is -5/2
Rise / Run
1. ) A (( -2 (x1) , 3 (y1) )), B (( 2 ( x2) , 6 (y2))
m = y2 - y1 / x2 - x1
m = 6 - 3 / 2 - (-2) = 3/4 (AB)
C (( -1 (x1) , 0 (y1)) , D (( 3 (x2) , 3 (y2))
m = 3 - 0 / 3 - (-1) = 0 / 4 = 0 (CD)
2. ) A (( 0 ( x1) , 2 ( y1 )) , B (( 5 ( x2 ) , ( 4 ( y2))
m = 4 - 2 / 5 - 0 = 2/5 (AB)
m = 3 - 8 / 3 - 1 = -5/2 (CD)
C (( 1 (x1) , 8 (y1)) , D (( 3 (x2) , 3 (y2))
Hope this helps.
what is the point slope form of (2,-6) , (4,0)
Answers
Hope this helps
At a basketball game, 13% were supporting the visiting team. If 3045 people attending supported the home team, what was the total number of people attending the game?
Answers
Answer:
3500
Step-by-step explanation:
13% - 100% = 87
(3045 x 100) divided by 87 = 3500 people
The total number of people attending the game will be 3500.
What is the percentage?The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates for one hundred percent. It is symbolized by the character '%'.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
At a basketball game, 13% were supporting the opposing group. On the off chance that 3045 individuals going to uphold the host group.
The percentage of supporting the home team will be given as,
⇒ 100% - 13%
⇒ 87%
The total number of people attending the game will be given as,
⇒ 3045 / 87%
⇒ 3045 / 0.87
⇒ 3500
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What is the measure of DA? (in a parallelogram)
Answers
Answer:
DA = 24
Step-by-step explanation:
the opposite sides of a parallelogram are congruent , then
CD = BA , that is
5x - 18 = 2x + 12 ( subtract 2x from both sides )
3x - 18 = 12 ( add 18 to both sides )
3x = 30 ( divide both sides by 3 )
x = 10
Then
CB = 3x - 6 = 3(10) - 6 = 30 - 6 = 24
so
DA = CB = 24
A triangle has side lengths of 7 and 14.
Select all of the possible lengths for the third side.
7
12
14
17
Answers
Answer:
12
14
17
Step-by-step explanation:
The rule with the sides of a triangle is whenever two sides add up it has to be greater than the third side.
For example: 17+7 = 24 , 24 >14, AND 14+17 = 31, 31<7 so 17 is a possible side for the triangle.
HOPE THIS HELPS :)
7^2 + B^2 = 14^2
49 + B^2 = 196
196-49=147
Then radical 147
Then your answer will be 12.12
Then round the answer to the nearest whole number
Your answer: 12
Solve the system using elimination.
X + 7y = 25
2x - 7y = -13
Answers
Answer:
Step-by-step explanation:
-2(1-8r)=-82
Can you give me the answer please
Answers
Answer:
[tex]r = - 5[/tex]
Step-by-step explanation:
[tex] - 2(1 - 8r) = - 82 \\ - 2 + 16r = - 82 \\ 16r = - 80 \\ \frac{16r}{16} = \frac{ - 80}{16} \\ r = - 5[/tex]
A builder buys some new tools for his business costing £1200. The store offers 5% trade discount. How much do the new tools cost after the discount?
Answers
Answer:
£1140
Solving steps:
Question: A builder buys some new tools for his business costing £1200. The store offers 5% trade discount. How much do the new tools cost after the discount?
Find: How much do the new tools cost after the discount?
Solution:
Step 1: find the value of the percentage
=> £1200 × 5/100
=> 1200/1 × 5/100
cancel the 0 of the denominators of 100 and 1200
=> [tex] \frac{12}{1} \times \frac{5}{1} [/tex]
=> [tex] \frac{60}{1} [/tex]
=> [tex]60[/tex]
Step 2: Substract the value which is 60 to 1200
=> 1200 - 60
Substract 60 from 1200
=> 1140
therefore after discount it cost £1140
Identify the factors of 4x2 20x 25. (4x 5)(x 5) (4x − 5)(x − 5) (2x 5)(2x 5) (2x − 5)(2x − 5).
Answers
The factors of the quadratic equation are (2x + 5)(2x + 5).
What are factors?
If (x – α) is the common factor of the given quadratic equations then, x = α becomes the root of the corresponding equation.
Given
The quadratic equation is;
[tex]\rm 4x^2+20x+25\\\\[/tex]
The factors of the equation are;
[tex]\rm 4x^2+20x+25\\\\4x^2+ 10x+10x+25\\\\ 2x(2x+5)+5(2x+5)\\\\(2x + 5)(2x + 5)[/tex]
Hence, the factors of the quadratic equation are (2x + 5)(2x + 5).
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If a snail moves 1 1/2 feet in 3 3/4 hours, what is its speed in feet per hour? Show you
simplify your answer.
Answers
Answer:
2/5 feet an hour
Step-by-step explanation:
d=vt
1 1/2 or (3/2)=v(3.75hours or 15/4)
divide both sides by 3.75hours
0.4f/h=velocity/speed
or in fractions 2/5
The speed of the snail in feet per hour will be 0.40 feet per hour.
What is speed?The distance covered by the particle or the body in an hour is called speed. It is a scalar quantity. It is the ratio of distance to time.
We know that the speed formula
Speed = Distance/Time
If a snail moves 1 1/2 feet in 3 3/4 hours.
Convert the mixed fraction number into a decimal number. Then we have
1 1/2 feet = 1 + 0.5 = 1.5 feet
3 3/4 hours = 3 + 0.75 = 3.75 hours
Then the speed of the snail in feet per hour will be given as,
S = 1.50 / 3.75
S = 0.40 feet per hour
The speed of the snail in feet per hour will be 0.40 feet per hour.
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which eqaution dosen't belong
Answers
Answer:
you need more info please
Step-by-step explanation: