2cos60° + 3sin-45° - 3sin30° + 2cos90°
= 2 × 1/2 + 3 × -1/√3 - 3 × 1/2 + 2 ×0
= 1 - 3/√3 - 3/2 + 0
= 1 - 3/√3 - 3/2
= 1 - 3/1.732 - 1.5. <----> ( √3 = 1.732 )
= 1 - 1.732 - 1.5
= -2.232
26. The two triangles below are similar. What
is the perimeter of triangle XYZ?
Answer:
24
Step-by-step explanation:
6 ÷ 15 = 0.4
X to Y = 20 × 0.4 = 8
Y to Z = 25 × 0.4 = 10
Perimeter: a + b + c
6 + 8 + 10 = 24
Even I am surprised by what I wrote. Hopefully, it is right and helps you ^-^ Please comment if you have any questions.
-Tay did this
Last Friday Oscar had $15. Over the weekend he received some money (x) for cleaning his room. How much money did he receive (y)?
Answer:
10
Step-by-step explanation:
because 5/15=3x
Tell whether -2 is a solution of the
inequality 6g – 14 > - 21
Answer:
3(4g + 6) = 2(6g + 9)
Distribute 3 and 2 inside their respective parentheses.
12g + 18 = 12g + 18
Step-by-step explanation:
(2g+3)(5g^2-6)
or (5g^2-6)(2g+3)
PLS HELP ! NEED IT
GIVNG BRAINLIEST
Answer:
21.75 or [tex]21\frac{3}{4}[/tex]
Step-by-step explanation:
You have to convert from a mixed number to a decimal. You can follow the following steps: To do this:
1.) You must divide the fraction's numerator by the denominator.
2.) You must now add the quotient obtained to the part of the Whole number.
you will get:
[tex]{\large\boxed{\fcolorbox{7}{\frac{1}{4}=7+0.25=7.25 }}[/tex]
The scale of the image that maps "Figure a" to "Figure b" is:
[tex]{\large\boxed{\fcolorbox{1:7.25}}[/tex]
3.) You have to multiply by 7.25 the length of the corresponding side of "Figure A" in order to find the value "x."
The final result will be:
[tex]{\large\boxed{\fcolorbox{x=(3)(7.25)}}[/tex]
[tex]{\large\boxed{\fcolorbox{x=21.75}}[/tex]
Help! Use the identity of i^2=-1 to compute the powers of i and complete the table
Answer:
Step-by-step explanation:
i^3= -i
i^4= 1
i^5= i
i^6= -1
i^7= -i
For the other questions, can you give me the value of N. If that is not possible, then sorry I can not help you. And feel free to report this if this is not useful :(
what is the sum 0 of 62
evaluate bc + 5a
when a = 3, b = 4, and c = -6
Answer:
-15
Step-by-step explanation:
if b= 4 and c=-6 it would be 5 times -6 which equals to -30. since this equation needs to be done with pemdas you dont add just yet. then you go and multiply 5 times 3 which is 15. and then you can add both totals you got which would be 15 + -30.
Can you simply these fractions?
Here is your answer. Hope it helps
A shirt is on sale for $42 if this is 4/5 of the original price of the shirt what was the original price of the shirt
Answer:
$52.50
Step-by-step explanation:
42=4x/5
210=4x
x=52 50
How is one "cleansed" in the preparation to recieve the gift of the holy spirit in confirmation?
Answer:
Hello guys
Step-by-step explanation:
Hope it's helped you
Can someone help me with this math question it’s on the image please!
Answer:
564
Step-by-step explanation:
56
Answer:
A is equal to 3 and B is equal to 2
A diagram of a swimming
pool is below. The width of
the pool is 25 m, find the
length of the actual pool?
7.5 cm
15 cm
Help please! Find the surface area WITHOUT the bottom.
Answer:
B
Step-by-step explanation:
(6.5×6.5)2+(1÷2×5×6)2
Find the slope of each line.
The slope of your line is __
so the rate is $__ per week.
The slope of your friend's line is __
so the rate is $__ per week.
How much more money does your friend save each week than you?
Your friend saves $__ more.
I'll do 15 points this time.
2. What does Decay means?
O To increase more and more.
O To get lesser and lesser.
O To multiply.
O To get higher.
Help????? 5 rate its due at 8:00 hehee.....
John left school with 8.43 he found a quarter on his way home and then stopped to buy an Apple for 0.89 . how much money did he have when he got home
Answer:
7.79
Step-by-step explanation:
Answer:
John had $7.79 when he got home
Step-by-step explanation:
8.43 + 0.25-0.89
Hope this helps :)
This is More of a Studying Question. How do you remember how to do a certain type of math, I’m going back to school in a month they just decided to make us take state tests again and I’m having major issues Remembering How to do Algebra so I am trying to re-learn half of it in under a month.
Answer:
Step-by-step explanation:
I know this might not be a great answer, but for myself it is much easier to remember math concepts when I apply the concept to real world problems while I am learning. This has two benefits, you will be practicing the concept which reenforces the learning and it automatically tells your brain that the information is valuable in life and that is should remember the idea.
Can someone help me with this math problem? and show me the work? please haha
Divide -4x^3 +2x^2-x+3 by x-2
Each quadrilateral below is a parallelogram. Find the missing measures
Answer:
[tex]ST=3[/tex], [tex]VT=10[/tex], [tex]m[/tex]∠[tex]V=48[/tex]°, [tex]m[/tex]∠[tex]T=132[/tex]°
Step-by-step explanation:
In a parallelogram, opposite sides are congruent and therefore have the same length. Thus, [tex]ST=RV=3[/tex] and [tex]VT=RS=10[/tex].
Similarly, opposite angles in a parallelogram are congruent and therefore have the same measure. Thus, [tex]m[/tex]∠[tex]V=m[/tex]∠[tex]S=48[/tex]° and [tex]m[/tex]∠[tex]T=m[/tex]∠[tex]R=132[/tex]°. Hope this helps!
Sam has 3 bottles of water. Together, sam and Dave have at most 12 bottles of water
Answer:
Dave has 9 bottles of water
Step-by-step explanation:
12-3=9
please help i’m trying to get my math grade up lol
Answer:
a)
Step-by-step explanation:
2(6x)=12x
2(5x)=10x
=22x
2(-4)=-8
22x-8
Lori bought some cookies for $2 each and muffins for $3 each. She bought twice as
many muffins as cookies and spent $16. How many cookies did Lori buy?
Answer:
2 cookies
Step-by-step explanation:
let c represent cookies, m represent muffins. set up a system of equations:
2c+3m=16
m=2c
(the top equation shows that cookies are $2 each, and muffins are $3, and that the total cost is $16. the bottom equation shows that Lori bought twice as many muffins as cookies).
then solve the system of equations by substitution, substituting 2c for m in the top equation:
2c+3(2c)=16
2c+6c=16
8c=16
c=2
this means that lori bought 2 cookies.
Answer:
2 cookies
Step-by-step explanation:
let c = no. of cookies
2c = no. of muffins
The cost for c cookies is 2c since each cookie was $2
and the cost of 2c muffins is 3(2c) = 6c since each muffing was $3
The total cost = 2c + 6c = 16
8c = 16
c = 2
So, she bought 2 cookies and 4 muffins
The value of Melissa's Jeep is $28,000 and is depreciating at a rate of 14% per year. Use an exponential function to find the value of the Jeep after 6 years. Round to the nearest cent. *
Answer:
$12,088
Step-by-step explanation:
Value = $28,000
Rate, r = 14% = 0.14
Time = 6 years
Using an exponential function :
A = Pe^-rt
P = initial value
A = final worth
A = 28000*e^-(0.14*6)
A = 28000 * e^-0.84
A = 28000 * 0.4317105
A = 12087.894
Worth after 6 years = $12,088
Please help will give brainlest
PLZ PLZ PLZ ANSWER THIS QUESTION!!!!!!!
Answer:
d
Step-by-step explanation:
Sumaya is using two different strings of Christmas lights to decorate her house.one string flashes every 10 seconds.the other one string flashes every 15 seconds.when Sumaya turns on the lights they flashes at the same time.work out how long it will be before they flash again at the same time.use the LCM to help you work out your answer
Answer: 30 seconds
Step-by-step explanation:
From the question, we are informed that one string flashes every 10 seconds while the other one string flashes every 15 seconds.
The number of minutes that it'll take before they both flash again at the same time will be gotten by calculating the LCM of 10 and 15. This will be:
10 = 10, 20, 30, 40, 50 ...
15 = 15, 30, 45, 60, 75 ....
We can see that the lowest common multiple of 10 and 15 is 30. Therefore, the answer is 30.
They'll both flash again at same time in 30 seconds.
Helppp me please should be pretty easy
Answer:
(0,3)
Step-by-step explanation:
Answer:
0, 3
Step-by-step explanation:
first find the x axis variable, (0), then find the y axis variable, (3).
Janice has $2.30 made up of dimes, pennies and quarters. She has as many dimes as pennies and she has 17 coins in all. How many quarters does she have? (PLEASE HELP ME)
Answer:The equation would be 230 = 25y + 10x + 1x or 230 = 25y + 11x
You would then need to solve for x and y, which I forget how to do with 2 variables but since we're working with small numbers what I would do is continuously subtract 25 from 230 until the remainder is divisible by 11.
230 - 25*7 = 55 = 11*5
x = 5
Ok, adding the equation 2x+y = 17 you will now be able to solve for the two variables using a system of equations.
yes, you can come up with an equation. actually, you can come up several equations to generate a system of equations.
your first equation is correct.
(1) 25q + 10d + 1p = 230
now, you're told that the number of dimes equals the number of pennies. that just means, in symbols:
(2) d = p
finally, you're told that you have 17 coins in all, i.e.:
(3) q + d + p = 17
you now have three equations and three unknowns. use (2) to reduce (1) and (3).
(1′) 25q + 11d = 230
(3′) q + 2d = 17
now solve for the three variables.
Answer:
7 quarters
Step-by-step explanation:
We can use the guess method.
17 coins altogether, and as many dimes as pennies.
The number of quarters must be odd. When you subtract an odd number of quarters from 17, you get an even number which will divide by 2 evenly giving you the same number of pennies and dimes.
Start with a guess of 7 quarters.
17 - 7 = 10
7 quarters + 5 pennies + 5 dimes have a value of $2.30
Wow, I got it with the first guess.
Answer: 7 quarters
A = (1,5)
C = (1.75, 2.5)
B = (?)