Answer:
Step-by-step explanation:
Mary spends 8*6=48 dollars
Pete spends 9*12=108
Mary got a better deal per cupcake
Answer:
They spent the same amount per cupcake ($1.33)
Step-by-step explanation:
To solve this, we need to find the unit rate of cost per cupcake. To do that, we divide 8 by 6 and divide 12 by 9. When we do that, we get 1.33 for both. That means they spent the same amount per cupcake ($1.33).
sina×tga=1/2, cosa=?
Answer:
cos a = -1.28 and 0.78
Step-by-step explanation:
The question is not properly written. This is the correct question:
If sina×tan(a) = 1/2, find cosa
According to trigonometry identity;
tan a = sina/cosa
sina×tan(a) = sin a * sina/cosa
sin²a/cos a = 1/2
(1-cos²a)/cosa = 1/2
Cross multiply
2(1-cos²a) = cos a
2 - 2 cos²a = cos a
2cos²a + cos a - 2 = 0
Let P = cos a
2P² + P -2 = 0
P = -1 ±√1-4(2(2)/2(2)
P = -1 ±√1+16/4
P = -1 ±√17/4
P = -1±4.12/4
P = -1-4.12/4 and -1+4.12/4
P = -5.12/4 and 3.12/4
P = -1.28 and 0.78
Since P = cos a
Hence cos a = -1.28 and 0.78
A teacher is writing an exam with 60
questions. If she has finished writing 70% of
the questions, how many questions does she
still need to write?
A) 18
B) 20
C) 30
D) 42
Can smb yk..
1) Write an equation of a line that
is parallel to y = -5x + 2 and
passes through (-1, 4).
Answer:
y=-5x + 4
Step-by-step explanation:
Answer:
y=-5x-1
Step-by-step explanation:
It goes through the point (-1,4)
Зу – х = -5
-7х + 4 = –18
Solve each system of equation using elimination
Answer:
(1)xy=-5-3
-8ans
Step-by-step explanation:
(2) -3x =-18
-15ans
Identify the slope, or rate of change, and describe it in terms of the problem. A contractor charges an initial fee of $50 and then $225 for every three days of work it takes to complete the project. Identify the rate of change and describe it in terms of the problem.
Answer:
$75
Step-by-step explanation:
Given,
Initial fee / charge = $50
Charge per 3 days of work = $225
The rate of change is the slope which is the change in amount charged per day;
HENCE, we need to calculate the charge per day on other to find the rate of change :
If $225 is charged for 3 days
Amount charged per day is ;
$225 / 3
= $75 is charged per everyday of work it takes to complete the project
In a right triangle the length of a hypotenuse is c and the length of one leg is a, and the length of the other leg is b, what is the value of b, if c=13, a=5
9514 1404 393
Answer:
b = 12
Step-by-step explanation:
A commonly seen "Pythagorean triple" is (a, b, c) = (5, 12, 13).
The value of b is 12.
__
You may be expected to find this using the Pythagorean theorem.
a² +b² = c²
b² = c² - a²
b = √(c² -a²) = √(13² -5²) = √(169 -25) = √144
b = 12
_____
Additional comment
Pythagorean triples you will run across are ...
(3, 4, 5), (5, 12, 13), (7, 24, 25), (8, 15, 17), (9, 40, 41)
and their multiples, such as 2×(3, 4, 5) = (6, 8, 10). Of course, there are an infinite number of integer Pythagorean triples, but these are ones commonly seen in algebra, trig, and geometry problems.
help me please:(((((
Answer:
I will do the first one for you 115/24
Step-by-step explanation:
First find the prime number is of the number on the bottom of the fraction
Second after finding the prime numbers multiple all the times number starting with the bigger number’s prime number, and if the other prime number have a pair dont add them into equation. Ex 8-2 2 2 and 4-2 2 the 8 has 3 (2s) cancelling out the 4’s( 2s) other ex. 6-2 3 and 18- 2 3 3 the 18 has a 2 and 3 cancelling out the 6’s 2 and 3 making it multiple 2x3x3
Third after finding this number at step (2) this is the number at the bottom of the fraction making it easy to do any equations on it
Hope this helps :D
Solve: 32 = y + 12.4 y = _____
Answer:
ok the answer is 32=y+12.4y=12.32
Step-by-step explanation:
Answer:44.4
Step-by-step explanation: add 12.4 + 32
can yall explain me what is PSAT please i need to know :)
Answer:
g o o g l e states, "The PSAT/NMSQT stands for the National Merit Scholarship Qualifying Test, which students take as a sophomore or junior."
Step-by-step explanation:
Answer:
The PSAT stands for Practice Standardized Aptitude Test.
Step-by-step explanation:
This test is meant to evaluate a student's college-specific skills.
Is 14/9 greater than 2
Answer:
No
Step-by-step explanation:
14/9ths is not greater than two because 9 two times is greater than fourteen.
Answer:
No
Step-by-step explanation:
Because, 14/9 is equal to 1.555.... and 1.555.... is less than 2.
Hope I helped!!
Sorry if its wrong! :(
Pls mark brainlist!!!
The question is on the fill
Answer:
Your mom is annoying
Step-by-step explanation:
She keeps calling me even though its over.
You are traveling to Sacramento, CA from Los Angeles, about 375 miles by train. If the train travels an average speed of 30 mph, how long will it take to reach Sacramento?
Answer:
12.5 hours
Step-by-step explanation:
divide 375 by 30 and you get how many hours it would take
12.5
The image of polygon MNOP after a similarity transformation is polygon WXYZ Each side of MNOP is 2 times as long as the corresponding side of WXYZ. What is the scale factor of theletation in the similarly transformation
A. 4
B. 0.5
C. 2
D. 0.25
Answer:
4
Step-by-step explanation:
i need to know the scale factor of the first image in order to figure out the scale factor for the second one
Answer:
0.5
Step-by-step explanation:
PLATO
Order the following integers from least or greatest
A. -15, +60, -32, +11, 0
B. -15, -12, 0, +81, -29
Answer:
Hope this helps!
Step-by-step explanation:
I'm going to do it from least to greatest:
A. -32, -15, 0, +11, +60
B. -29, -15, -12, 0, +81
Good Luck! \(￣︶￣*\)
Standard Form: 3x+4y=−16
Answer:
i know the answer
Step-by-step explanation:
Suppose y varies directly as x, and y=26 when x=8. Find x when y=65.
Answer:
when y=65, x=20
Step-by-step explanation:
We are given:
y varies directly as x
and y=26, when x=8
We need to find x, when y = 65
y varies directly as x can be written as:
[tex]y\:\alpha \:x\\y=kx[/tex]
Where k is constant of proportionality.
Finding k, when y=26 and x=8
[tex]y=kx\\26=k(8)\\k=\frac{26}{8}\\k=3.25[/tex]
We get the value of k = 3.25
Now, we need to find value of x, when y=65 and k=3.25
[tex]y=kx\\65=3.25(x)\\x=\frac{65}{3.25}\\x=20[/tex]
So, when y=65, x=20
Write the equation of the line using slope-intercept form
with the following information:
( 1,9) and (2,3)
Answer:
its 1290 ans there is the awer
Hiii I’m new I need help
On this question pls thank you
Answer:
answer 2
Step-by-step explanation:
The following table represents a proportional relation. Find the missing values:
x 0 1 2 3 4
y
13.2
Answer:16288.xy
Step-by-step explanation:
solving systems of linear inequalities
Answer:
YES. (2, 7) is a solution of the system.
Step-by-step explanation:
System of linear inequalities has been given as,
y ≥ -x + 1 --------(1)
y < 4x + 2 ------(2)
If (2, 7) is a solution of the given system of inequalities, it will satisfy both the inequalities.
By substituting the coordinates of point (2, 7) in inequality (1),
7 ≥ -2 + 1
7 ≥ -1
True.
By substituting the coordinates of point (2, 7) in inequality (2),
7 < 4(2) + 1
7 < 9
True.
Therefore, point (2, 7) lie in the solution area of system of inequalities.
YES. (2, 7) is a solution of the system.
How much money she owe her plz help
what is 333x2+999-999 divided by 2 =
Answer:
333×2+999-999÷2= 333
Step-by-step explanation:
Answer:
333
Step-by-step explanation:
333 x 2 = 666
666 divided by 2 = 333
999 - 999 = 0, so it doesn't do anything to the final number
The answer is 333
hope this helped~
Can somebody help me. Will mark brainliest.
PLEASE HELP SOLVE THESE!! DUE IN AN HOUR!! THANK YOU:))
Answer:
1, (2,5)
2, (6,2)
3, (-5,9)
Step-by-step explanation:
OMG I was doing the same thing solving by elimination. can I get the brainlest? Pls
hey anyone here! I need some help solving and understanding these please! I tried so hard but don't quite understand
Step-by-step explanation:
this is the solution to both of these questions in that picture.
0 = 4x + 4 linear equation
Answer:
x = -1
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Step-by-step explanation:
Step 1: Define
0 = 4x + 4
Step 2: Solve for x
Subtract 4 on both sides: -4 = 4xDivide 4 on both sides: -1 = xRewrite: x = -1Subtract. 549 -176 Enter the answer in the box.
Answer:
373
Step-by-step explanation:
Answer:
373
Step-by-step explanation:
Question 1 (5 points)
(01.01 LC)
What is the decimal equivalent of 5 over 9
0.5
0.6
0.8
0.9
Answer:
0.5 is the answer to this
Answer:
0.5 is the answer
Step-by-step explanation:
What value of x makes the equation below true? −2x=−36 A x=−34 B x=−38 C x=−18 D x=18
Answer:
D x = 18
Step-by-step explanation:
Given equation:
−2x = −36
Divide both sides by -2 to find x
−2x / -2 = −36 / -2
x = −36 / -2
x = 18
x = 18 makes the equation −2x = −36 true
What is the solution to the
y = 4x – 10
y = 2
O (3, 2)
O (2, 3)
O (-2, 2)
O (2,-2)
Answer:
this is the answer. (3,2)
