Answers
Answer: Choice C
x+y = 28
3x+4y = 100
===================================================
Explanation:
x and y are placeholders for nonnegative whole numbers.
Specifically,
x = number of three point questions
y = number of four point questions
Since we have 28 questions total, this must mean x+y = 28. That forms the first equation in our system of equations.
------------
Now let's form the second equation:
x = number of three point questions
3x = points we get from all the three point questions
y = number of four point questions
4y = points we get from all the four point questions
3x+4y = all points possible
3x+4y = 100 is the second equation
------------
So we have this system
[tex]\begin{cases}x+y = 28\\3x+4y = 100\end{cases}[/tex]
which fits the conditions in the instructions.
Related Questions
Twelve plus the product of twelve and a number is seventy-two.”
Answers
Steps:
12+12x=72
Minus 12 from both sides
12x=60
Divide both sides by 12
60/12=5
HELP PLEASE Which of these mappings is a function?
Answers
Answer:
B; x is the one that's a function because for every input there is one output. for all the other ones a x-value has two y-values and that's not function.
Step-by-step explanation:
the bottom of a 15 foot ladder is placed 3 feet back from the wall. How far up the wall will the top of the ladder reach? ( round to 1 decimal place.
a) 15 feet
b) 18 feet
c) 14.7 feet
d) 15.3 feet
Answers
Answer:
It’s c
Step-by-step explanation:
It’s simple
Find the difference.
89 – 52.05
A. 36.95
B. 35.95
C. 37.95
D. 37.05
Answers
• The perimeter of a rectangular field is 118 meters.
• The width of the field is 19 meters shorter than the length.
What is the length, in meters, of the field?
Answers
Answer:
101 meter
Step-by-step explanation:
I think
please help asap!!!!
An airplane is flying at an elevation of 11,000 feet. The airport is 4 miles away from a point directly below the airplane on the ground. How far is the airplane from the airport? (Hint: 1 mile = 5280 feet)
Answers
Answer:
I think it would be 21120
Step-by-step explanation:
srry if im wrong, but hope this helped! also pls correct me if its wrong ty :3
1234567891011121314151617181920
Answers
Sixty-five percent of what number is 26?
Answers
Answer:
40
Step-by-step explanation:
40 x 0.65 = 26
26 ÷ 0.65 = 40
20 Points!
I'm Really confused on this please help.
Write three points (x, y) that exist on the line.
Answers
Answer:
3 points on the line - (.5,3) (1,2) (1.5,1)
Step-by-step explanation:
y = -2x + 4 (1.5,1)
1 = -2x + 4 subtract 4 from each side
-3 = -2x divide each side by -2
1.5 = x
y = -2x + 4 (1,2)
2 = -2x + 4 subtract 4 from each side
-2 = -2x divide each side by -2
1 = x
y = -2x + 4 (.5,3)
3 = -2x + 4 subtract 4 from each side
-1 = -2x divide each side by -2
.5 = x
Answer:
(1,2) (2,0) (3,-2)
Step-by-step explanation:
What I did to get those is plug in the numbers 1, 2, and 3 as values of X.
-2(1)+4
that gave me 2 as the Y value and now we have the coordinate (1,2).
-2(2)+4
that gave me 0 as the Y value and now we have the coordinate (2,0).
-2(3)+4
that gave me -2 as the Y value and now we have the coordinate (3,-2).
hope this helps.
What is the solution set of the equation 9x^2 +6x = -1
Answers
Answer:
x= -1/3
Step-by-step explanation:
9x^2+6x+1=0
(3x+1)(3x+1)
x=-1/3
Answer: x= -1/3
Step-by-step explanation: The step take to long to write It’s only 3 step but going to be long but hope this answer help
Select the correct answer.
Which statement is true?
A. In any right triangle, the sine of one acute angle is equal to the cosine of the other acute angle
B. In any right triangle, the sine of one acute angle is equal to the sine of it's complementary angles.
C. In any right triangle, the cosine of one acute angle is equal to the cosine of it's complimentary angle.
D. In any right triangle, the sum of the sine of one acute angle and the cosine of the other acute angle is 1.
Answers
Answer:
The answer is B
Step-by-step explanation: Hope this helps
If you make $60 in 8 hours, what is the unit rate? hint: what is your hourly pay?
Answers
Answer:
$7.50
Step-by-step explanation:
Answer:
60 divided by 8 is 7.5
the unit rate is 7.5 and the hourly pay is $7.50
Find the value of the expressions when; a2+b +7 when a=5 and b=11.
Answers
What is the x-intercept of the graph that is shown below?
(-2,0)
(-1,2)
(0,4)
(4,0)
Answers
X,Y
X will always be the number of the horizontal line and Y always on vertical
please please help i’ll give brainliest tysm:))
Answers
328/16 =20.5
[tex]answer = \frac{328}{16} = 20.5[/tex]
ILL GIVE BRAINLESS HELP! Would appreciate u say how u got it
Answers
Answer:
114+18=132
Step-by-step explanation:
Write the recursive formula for 16,23,30,37
Answers
Answer:
Arithmetic Sequence
Step-by-step explanation:
Arithmetic Sequence
solve 6x^2 - 12x + 24 = 0 by completing the square
Answers
Answer: [tex]\quad x=1+\sqrt{3}i,\:x=1-\sqrt{3}i[/tex]
Step-by-step explanation: [tex]x_{1,\:2}=\frac{-\left(-12\right)\pm \sqrt{\left(-12\right)^2-4\cdot \:6\cdot \:24}}{2\cdot \:6}[/tex]
[tex]x_{1,\:2}=\frac{-\left(-12\right)\pm \:12\sqrt{3}i}{2\cdot \:6}[/tex][tex]x_1=\frac{-\left(-12\right)+12\sqrt{3}i}{2\cdot \:6},\:x_2=\frac{-\left(-12\right)-12\sqrt{3}i}{2\cdot \:6}[/tex][tex]x=1+\sqrt{3}i,\:x=1-\sqrt{3}i[/tex]The gym teacher is setting up for a field
day event where students will run
blindfolded through a series of
obstacles. To prevent injury she will
enclose the area with a nylon fence,
which can be ordered from Lowe's for
$15 a linear yard. How much will the
nylon fencing cost?
Answers
The total perimeter is 42 and 42x15=630
will give brainliest (9th grade geometry)
If the scale factor of Figure A to Figure B is 7:2, find the perimeter of Figure A.
Answers
Answer:
122.5 units
Step-by-step explanation:
The proportion would be between the perimeters and the given ratio:
7/2 = p/p
Where P is the perimeter of the bigger figure and p is the perimeter of the smaller figure.
Remember that the perimeter is the sum of all sides, using all given values and solving for P, we have
7/2=P/9+5+9+12
7/2=P/35
7(35)/2=P
P=245/2=122.5
Therefore, the perimeter of Figure A is 122.5 units.
Factorize completely 25x^2-90x+81
Answers
Answer:
Factor using the perfect square rule.
( 5 x + 9 ) ^2
HOPE THIS HELPS!!!
Step-by-step explanation:
OPEN PERENTHESIS FIVE X PLUS NINE CLOSED PERENTHESIS TO THE SECOND POWER
Someone answer this for me
Answers
Answer:
2 3/4
Step-by-step explanation:
I think is the right answer hope it helps
Gabriel is 12 years old, and his younger brother Elias is 2 years old.
How old will each of them be when Gabriel is twice as old as Elias?
Answers
Gabriel will be 20, Elias will be 10
We can use an equation to map out and solve for each age.
Years gone by = x
12+x=2(2+x)
12+x=4+2x
x=8
12+8=20, 2+8 =10
Divide the following polynomial using synthetic division, then place the answer in the proper location on the grid. Write answer in descending powers of x. (x4+81) / (x-3)
Answers
x^4-81= x^4+0x^3+0x^2+0x-81
! 1 0 0 0 -81
x+3→-3 ! -3 9 -27 81
---------------------------------------
1 -3 9 -27 0
x^3-3x^2+9x-27
Answer: x^3-3x^2+9x-27
AB=10 and BC=20 What is AC
Answers
Answer:
6
Step-by-step explanation:
A to B is 10
B to C is 20
You add them together and you get 30. A straight line is equal to 180.
You divide 30 to 180 and you get is 6.
how much are these coins worth?
Answers
Answer:
Step-by-step explanation:
1.65
Things how much there worth
Hope it helps
Consider these functions:
f(x) = 2x3 + 3
g(x) = x – 4
What is the value of g(f(x))?
Answers
Answer:
2x^3+3-4
Step-by-step explanation:
Answer:
2x^3 - 1
Step-by-step explanation:
Plato/Edmentum
21 feet of yarn costs $42.70. What is the price per yard?
Answers
divide the numbers and you will get your answer.
Reflect AABC across the x-axis.
1. How many units away from the x-axis
is point A?
PLEASEE I REALLY NEED HELP!!!!!
Answers
The position of point A of the triangle is -4 units from the x-axis.
What is coordinate geometry?A coordinate plane is a 2D plane created by the junction of the x-axis and y-axis, two perpendicular lines. A coordinate system in geometry is a way to use one or more integers or coordinates to determine the positions of the points.
Here in the given diagram, there is a triangle ABC. The coordinates of the vertex of the triangle are,
A ( -4,2 )
B ( 1, -5 )
C ( 3,1 )
The distance of point A from the x-axis is -4 units.
To know more about coordinate geometry follow
https://brainly.com/question/30097833
#SPJ7
Pls. Help me!!!!!!!!!!!!!!!!!!
Answers
Answer:
d i think
Step-by-step explanation:
Answer: C
Step-by-step explanation:
our points are
(0, 64) and (17, 30)
slope = 30-64/17-0 = -34/17 = -2
y=-2x+64 aka C