Answer:
D
Step-by-step explanation:
bl is blue eyes h = hazel eyes br = brown eyes
eq 1) bl + h + br = 34 sum of all the students
eq 2) bl + 2 = h blue eyes plus 2 equal hazel eyes
eq 3) br = 2( bl + h ) there are twice as many brown eyed student
as blue eyed and hazel eyed students
eq 1) bl + h + br = 34 substitute for h in eq 2) bl + 2 = h
bl + (bl + 2) + br = 34
eq 4) 2bl + 2 + br = 34 a new equation is created without h
eq 3) br = 2(bl + h) substitute in for h into eq 3) using eq 2)
br = 2bl + 2h remember eq 2 was be + 2 = h
br = 2bl + 2(bl + 2)
eq 5) br = 4bl + 4 another eq WITHOUT h
now solve eq 4) and eq 5) by subsitition
eq 5) br = 4bl + 4 sub bl into eq 4)
eq 4) 2bl + 2 + br = 34
2bl + 2 + (4bl + 4) = 34 ONE equation with ONE unknown
solve for bl
2bl + 4bl + 2 + 4 = 34
6bl + 6 = 34
6bl + 6 - 6 = 34 - 6
6bl = 28
3bl = 14
bl = 14/3 = 4 2/3 so who has the 2/3 eye???
none of these numbers match the solution options
need to check my answer for sure my math was correct
bl + h + br = 34 bl = 14/3
eq 2) bl + 2 = h 14/3 + 6/3 = h h = 20/3
eq 3) br = 2( bl + h )
br = 2(14/3 + 20/3)
br = 2(34/3)
br = 68/3
bl + h + br = 34
14/3 + 20/3 + 68/3 = 102/3 102/3 = 34 the numbers check
************ i suspect the equation was typed incorrectly ****************
if the total number of students were 36
blue eyes = 5
hazel eyes = 7
brown eyes = 2 times (5 +7) = 24
5 + 7 + 24 = 36
again none of these numbers match option
if the total number of students were 24
blue eyes = 3
hazel eyes = 5
brown eyes = 2 times (5 +7) = 16 D = 16
3 + 5 + 16 = 24
A total of 250 households were surveyed. What fraction of the total number of households have three televisions?
A. 23/100
B. 13/100
C. 1/50
D. 6/25
Evaluate the expression 21x, if x= 4.
Answer:
84
Step-by-step explanation:
x= 4
21x = 21 (4) = 84
I hop im right!!
There are 32 levels in Swamp Expedition, a popular video game. Anya beat 24 levels so far. What percent of the video game did Anya beat ?
PLSSSS ANSWER QUICKLY !!!
Answer:
75%
Step-by-step explanation:
shdhahzhhjsjsjsjwjjaaa
905=5a please help me i don't know what this is
Step-by-step explanation:
905÷5=5a÷5
there for a=181
(PLEASE HELP ME ASAP‼️)
Andrea spins the arrow on the spinner one time.
What is the probability that the arrow will land on a part of the circle that has a star?
Answer:
1
Step-by-step explanation:
I really can't give you a step-by-step
Which of the following equations below is NOT a linear inequality?
Y< 5x2 - 5
y> 3x + 2
Answer:Y< 5x2 - 5 because it will be squared making it an exponential function
Step-by-step explanation:
WILL GIVE BRAINLIEST
Answer:
the height is 15
Answer:
B) 15
Step-by-step explanation:
Volume of a cone formula:
V = πr²(h/3)
D/2 = r
10/2 = r
r = 5
393 = (3.14)5²(h/3)
393 = 78.5(h/3)
h = 15.02
h = 15
Pls help me with #1 and #2 ASAP
At Fireside Bookshop, you buy a book for $30.00. If the sales tax is 9.5%, what is the total price you pay for the book?
Answer:
$32.85
Step-by-step explanation: 9.5% of 30 is 2.85
30 + 2.85 = 32.85
HELP PLEASE DUE IN 3 MINUTES
Answer:
$3 dollars
Step-by-step explanation:
mode is the one that appears the most frequently in a set and three bucks is shown multiple times the most
Miguel measures two sides of a sail: 15 feet and 8 feet. Which could be the measurement of the third side?
A. 6 feet B. 10 feet C. 23 feet D. 30 feet
Answer:
10
Step-by-step explanation:
6 feet and 10 feet are the possible measurement of the third side.
What is Triangle?A triangle is a three-sided polygon that consists of three edges and three vertices.
To determine the possible measurement of the third side of the sail, we can use the triangle inequality theorem,
The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
Let's check the answer choices using the triangle inequality theorem:
A. 15 + 8 > 6
23 > 6
This is true, so 6 feet could be a possible measurement of the third side.
B. 15 + 8 > 10
23 > 10
This is true, so 10 feet could be a possible measurement of the third side.
C. 15+8 > 23
23=23
This is false, so 23 feet is not possible measurement of the third sid
D. 15+8 > 30
23>30
This is false, so 30 feet is not possible measurement of the third side
Hence, 6 feet and 10 feet are the possible measurement of the third side.
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Pizzeria Napoli sells a round pizza with diameter 16 inches and a square pizza with side length 15 inches. Which of the two shapes gives you more pizza and by how many square inches? (Round your answer to the nearest whole number)
Answer: Square, 24 square inches
Step-by-step explanation:
Given
Diameter of round pizza [tex]d=16\ in.[/tex]
Side of square pizza [tex]a=15\ in.[/tex]
Area of circle [tex]\pi r^2[/tex]
The area of a square is [tex]a^2[/tex]
[tex]\therefore \text{Area of round Pizza}=\pi \times (\frac{16}{2})^2\\\Rightarrow A_1=\pi \times 8^2=201.088\ in.^2[/tex]
The area of square pizza is
[tex]A_2=15^2=225\ in.^2[/tex]
Clearly, the area of square pizza is more and the difference in their area is
[tex]\Rightarrow A_2-A_1=225-201.088=23.91\approx\ 24\ in.^2[/tex]
Find the mean of the data in the pictograph below
Answer:
3.5
Step-by-step explanation:
14 wands
14/4=3.5
Answer:
30 wands in total
--------------------------------
30 divided by 4 is 7.5
--------------------------------
Your answer is [7.5 Wands]
Step-by-step explanation:
1hr 35mins + 60minutes + 61 minutes + 20minutes + 55minutes =
Answer:
4.85 hours
Step-by-step explanation:
(1 hr 35 minutes) + (60 minutes) + (61 minutes) + (20 minutes) + (55 minutes) =
4.85 hours
Divide the equation.
Answer:
3y+3
Step-by-step explanation:
I hope this works
I ran 1½ miles in 20 minutes . How fast did I go?
Answer:
4 MPH
Step-by-step explanation:
If you ran 1 1/2 miles in 20 minutes than in an hour you have ran 4 1/2 miles
Determine whether x=3, x=4, or x=5 is the solution.
42–x=37
Answer: x=5
Explanation:
Rearrange the equation
42-x=37 is the same as 37+x=42
Isolate the variable x by subtracting 37 from both sides
37-37 cancels out and 42-37 is 5
X=5 is what you’re left with
Need help please I'm not sure if I'm right
Answer:
58
Step-by-step explanation:
The angles inside a triangle always sum to 180°. We already have a 32° angle and a 90° - totalling 122° - and when we add x°, we'd like the sum to be 180°. So x must be 180 - 122 = 58.
Answer:
58
Step-by-step explanation:
The total should be 180 degrees. We know the the top angle is 32 degrees and the bottom left is 90 degrees because it has a square there. So 32+90=122. If we subtract 122 from 180 we are left with 58 degrees so x=58
The length of a shoe is 25 centimeters. How long is the shoe in meters? (Note: 1 meter = 100 centimeters)
Answer:
Step-by-step explanation:
Length of a shoe = 25 centimeters
Converting into meters
= 25/100
= 0.25 meters
what is 4/5 · 35???????????????
Answer:
28
Step-by-step explanation:
Help me with this please
Answer:
x = 25
Step-by-step explanation:
By the property,
Equal chords subtend equal angles at the center of the circle. Therefore, measures of arcs having equal central angles will be equal.
2x + 4x + (3x + 30) + (3x + 30) = 360°
(2x + 4x + 3x + 3x) + (30 + 30) = 360
12x + 60 = 360
12x = 300
x = [tex]\frac{300}{12}[/tex]
x = 25
For which equation is y = 7 a solution?
A) 7y = 1
B) 18 = 11 + y
C) y + 7 = 0
D) y/2 = 14
Answer:
B
Step-by-step explanation:
11+7=18
Sike this system of equations by graphing . First graph the equations and then type the solution y=7/2x+3 y=-x-6
Answer:
I’ve got the graphs for both equations below.
With y = 7/2x + 3
y = -x-6
I used substitution with simultaneous equations and got x = -2 and y = -4 :)
Como se calcula la medida de la sircunferencia si conocen la medida del diámetro
Round 5,784 to the nearest ten
Answer:
I think you might mean 5.784 and if that is the case it would be 5.8
Step-by-step explanation:
5.8 would be the answer because 8 is closer to 10 than 0 so 7 would be rounded up to 8
imagine that you are in an argument with a friend about the size of the slice of pizza you were both served. your friend says that it was unfair because you got a bigger piece what information would you need to know about each slice of pizza in order to calculate which one had a larger area? explain.
We need to know the Angle subtended by the slice at the center of the pizza i.e. Θ, Radius of the pizza i.e. r about each slice of pizza in order to calculate which one had a larger area.
What is area ?Area is defined as the quantity that expresses the extent of a region on the plane or on a curved surface.
Area of sector [tex]=\frac{\theta}{360}\pi r^2[/tex]
Here,
Θ = angle subtended by the arc at the center.
We have,
Slice of pizza,
So,
As per the mentioned formula,
we need to know,
Angle subtended by the slice at the center of the pizza.Radius of the pizza.So, that we can calculate the area of the slice or pizza.
i.e.
Area of slice [tex]=\frac{\theta}{360}\pi r^2[/tex]
Hence, , we can say that the We need to know the Angle subtended by the slice at the center of the pizza i.e. Θ, Radius of the pizza i.e. r about each slice of pizza in order to calculate which one had a larger area.
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Three friends share 4 packs of Expo Markers.
How much of the pack will each friend
receive?
Answer:
1 1/3
Step-by-step explanation:
4/3 = 1 1/3
what is the surface area of this design
Answer: 197.
Step-by-step explanation:
PLEASE HELP ASAP WILL GIVE BRAINLIEST Question 1 of 10
Which point lies on the line described by the equation below?
y + 4 = 4(x-3)
A. (1,-11)
B. (3,-4)
C. (1,11)
D. (0,0)
E. (-2,3)
O F. (2,9)
Answer:
(3, -4)
Step.
The coordinates of the point which lies on the equation is A ( 3 , -4 )
What is an Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the equation be represented as A
Now , the value of A is
y + 4 = 4 ( x - 3 ) be equation (1)
when x = 3 and and y = -4
Substituting the values of x and y in the equation , we get
-4 + 4 = 4 ( 3 - 3 )
0 = 4 ( 0 )
0 = 0
Therefore , the point A ( 3 , -4 ) lies in the equation
Hence , the coordinates of the point is A ( 3 , -4 )
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4) Does the table show a function?
Yes or no
Answer:
yes
Step-by-step explanation: