Answer:
Please see the explanation.
Step-by-step explanation:
Let
[tex]f\left(x\right)=cosx[/tex]
By the first principle
[tex]f\:'\left(x\right)=\lim _{h\to 0}\left(\frac{f\left(x+h\right)-f\left(x\right)}{h}\right)[/tex]
[tex]=\lim _{h\to 0}\left(\frac{cos\:\left(x+h\right)-cos\:x}{h}\right)[/tex]
[tex]=\lim _{h\to 0}\left[\frac{cos\:x\:cos\:h-sin\:x\:sin\:h\:-\:cos\:x}{h}\right][/tex]
[tex]=\lim _{h\to 0}\left[\frac{-cos\:x\left(1-cos\:h\right)-sin\:x\:sin\:h\:}{h}\right][/tex]
[tex]=\lim _{h\to 0}\left[\frac{-cos\:x\left(1-cos\:h\right)\:}{h}-\frac{sin\:x\:sin\:h}{h}\right][/tex]
[tex]=-cosx\:\left(\lim \:_{h\to \:0\:}\frac{1-cos\:h}{h}\right)-sin\:x\:\lim \:\:_{h\to \:\:0}\:\left(\frac{sin\:h}{h}\right)[/tex]
[tex]=-cosx\:\left(0\right)-sinx\left(1\right)[/tex]
[tex]=-sin\:x[/tex]
length A is 4 ft. after a dilation is performed length B is 7ft. what was the scale factor used?
The Smith family went out to dinner and received great service. They decided to
leave a 20% tip for their waitress. If their dinner bil totaled $90, how much was the
tip? Think You need to find what percent of what number? Show your work
Answer:
$75
Step-by-step explanation:
90=1.2x
90/1.2=x
75=x
Answer:
$75 :D
Step-by-step explanation:
90=1.2x 90/1.2=x 75=x
can 15/55 be simplified. and if so what would it be?
Answer: [tex]\frac{3}{11}[/tex]
Step-by-step explanation:
This number can definitely be simplified by five.
= [tex]\frac{15}{55}[/tex] ÷ [tex]\frac{5}{5}[/tex]
= [tex]\frac{3}{11}[/tex]
Hope this helps! :D
Someone plis help me with this homework
Answer:
True
Step-by-step explanation:
The diagram shows a triangle PST and a parallelogram PQRS.
EASY MATH QUESTION PLS HELP!!!
Which of the following values is a solution for the inequality statement?
Select all that apply.
Answer:
-150, 55, -78
Step-by-step explanation:
44>a-64
108>a
HELPHELPHELPHELPHELP
please answer this for me I need it it's due at midnight
Pierre correctly simplified an expression. When he substituted x = 2 into the simplified expression, the value was 20. Which could be Pierre’s original expression?
2(7x – 4)
2(x – 19)
2(x + 10)
2(5x + 1)
Answer:2(7x-4)
Step-by-step explanation:
Answer:
The correct answer is A.) 2(7x – 4)
Step-by-step explanation:
I just did the test and got it right
solve the equation for w. x=w/a
Answer:
w=xaStep-by-step explanation:
Rewrite the equation as w/a=x
w/a=x
Multiply both sides of the equation by a
w=x*(a)
Multiply x by a
w=xa
Hope this helped!
can someone pls help me?
Answer:
yes, every one will fit.
Step-by-step explanation:
114 divided by 3 is 38 so there are 38 teams and each person will fit.
9514 1404 393
Answer:
22. yes
23. is divisible by 9
Step-by-step explanation:
A number is divisible by 9 if the sum of its digits is divisible by 9. The process of reducing the sum of digits to a single digit is called "casting out nines." It can be a useful process for checking arithmetic of all sorts.
A number is divisible by 3 if the sum of its digits is divisible by 3.
__
22. 114 is divisible by 3 because 1+1+4 = 6, a number divisible by 3. Everyone will have a spot.
__
24. 2187 has a sum of digits of 2+1+8+7 = 18, which has a sum of digits of 1+8=9. This is divisible by 9, so 2187 is divisible by 9.
5 points
A gym charges a $50 fee plus $20 per month. Another gym charges a fee
of $500. How many months will it take for the charges at the first gym to
reach $500? *
A 020 months
B 5.5 months
C 022.5 months
D 22 months
Step-by-step explanation:
it so easy bro 5.5 ok bro.
What is -10 plus 9 ?
Answer:
-1
Step-by-step explanation:
I NEED A GOOD ANWSER
How many 6 inch photos will fit inside 48 inches?
(please write your answer and explain.
Answer:
8
Step-by-step explanation:
48/6 = 8
If this is what the question is asking.. just divide the space by the size of photos
In the figure below, o ll m. Find the values of y and z
Answer: y = 117 and z = 32
Step-by-step explanation:
y: 180 - 63 = 117
z: 180 - 117 (also known as y) = 63 which is the top corner right next to the equation for z, so you do it again. 180 - 63 = 117
then you do 117 + 43 = 160, then 160 divided by 5 = 32
which means that 5(32) - 43 = 117, 5 x 32 = 160 - 43 = 117.
hope this helps
CAN SOMEONE PLEASE HELP ME ASAP
Answer:
i think x would be 15
Step-by-step explanation:
A man had a piece of leather that was 34 metre long. He cut off 25 metre for a project and then cut off a 30-centimetre piece to give to his friend. What fraction of the original piece of leather is left? How many centimeters of the leather is left?
Answer:
8.7 meters left or 870 cm left
0.256 is fraction... 87/340
Step-by-step explanation:
34-25-0.3=8.7 8.7 x 100=870 cm
Tanyas baked goods took in 175$ To help raise money for the chorus club .Tanya need to spend 32$ for baking supplies write and evaluate and addition expression to find how much profit tanyas baked goods make ?
Step-by-step explanation:
6 I think that is the answer I hop you get it right
WHOLE NUMBERS AND INTEGERS
Identifying a sum as a point located a given distance from...
The number 5 is plotted on the number line below.
10
Answer the following questions.
(a) Which is a point 3 units to the right of 5 ?
5+(-3)
5+(-3)
O-5+3
5+3
(b) Which is a point 3 units to the left of 5 ?
S (3)
5+(-3)
0 5+3
5+3
Answer:
a) Point to the right: you need to add
5 + 3Last option
b) Point to the left: you need to subtract or add negative
5 + (-3)First option
Solve for x to the nearest degree.
A 72
B 71
C 18
D 19
I’ll give brainliest (plz asap)
Answer:
it's 3/10
Step-by-step explanation:
you would have to multiply all of those fraction so:
3/4 x 4/5 x 1/2= 3/10
i am so so sorry if i am wrong
Remy has $150 to spend on party supplies. She spends $75.50 on decorations and various other supplies. She spent the remaining money to order invitations. If she invited 20 people to her party, how much was the cost to print each invitation?
Answer:
the cost to price of each invitation is $3.725
Step-by-step explanation:
Given that
On party supplies she incurred $150
For decorations and various other supplies she incurred $75.50
The remaining amount i.e.
= $150 - $75.50
= $74.50
This amount would be incurred for the invitations
Now she invited 20 people
SO the cost to price of each invitation is
= $74.50 ÷ 20 people
= $3.725
Hence, the cost to price of each invitation is $3.725
Last year, the average cost of a computer was $730. This year, the cost has decreased by 10%. What is the average cost of a computer this year?
Answer:
657
Step-by-step explanation:
What is the value of X in this triangle?
Answer:
x = 3
Step-by-step explanation:
An equilateral ∆ has equal side lengths and all its angles are also equal to each other, which are 60° each.
The ∆ given has equal side lengths. Therefore it is an equilateral ∆ having equal angles, each would measure 60°.
Thus:
(25x - 15) = 60°
Solve for x
25x - 15 = 60
Add 16 to both sides
25x - 15 + 15 = 60 + 15
25x = 75
Divide both sides by 25
25x/25 = 75/25
x = 3
find the difference (20m+3)-(7m-5)
Answer:
Simplifying
(20m + 3) + -1(7m + -5) = 0
Reorder the terms:
(3 + 20m) + -1(7m + -5) = 0
Remove parenthesis around (3 + 20m)
3 + 20m + -1(7m + -5) = 0
Reorder the terms:
3 + 20m + -1(-5 + 7m) = 0
3 + 20m + (-5 * -1 + 7m * -1) = 0
3 + 20m + (5 + -7m) = 0
Reorder the terms:
3 + 5 + 20m + -7m = 0
Combine like terms: 3 + 5 = 8
8 + 20m + -7m = 0
Combine like terms: 20m + -7m = 13m
8 + 13m = 0
Solving
8 + 13m = 0
Solving for variable 'm'.
Move all terms containing m to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + 13m = 0 + -8
Combine like terms: 8 + -8 = 0
0 + 13m = 0 + -8
13m = 0 + -8
Combine like terms: 0 + -8 = -8
13m = -8
Divide each side by '13'.
m = -0.6153846154
Simplifying
m = -0.6153846154Step-by-step explanation:
Answer:
(20m+3)-(7m-5).
(20m-7m)+(3+5).
13m(8). =104m
104m is your anwser! Hope this helps!
What should I choose
Answer:
Orange juice.
Step-by-step explanation:
It's the best thing ever it always gets u an A+ when you give it to your teachers
Answer:
variables
Step-by-step explanation:
Hope this helped, Have a Great Day!!
The price of a cup of coffee was 2.30 yesterday. Today, the price fell to 2.15 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.
Answer:
6.5%
Step-by-step explanation:
Percentage decrease
[tex] = \frac{2.30 - 2.15}{2.30} \times 100 \\ \\ = \frac{0.15}{2.30} \times 100 \\ \\ = \frac{15}{2.30}\\ \\ = \frac{150}{23}\\ \\ = 6.52173913 \\ \\ \approx \: 6.5\%[/tex]
find the radius given the linear speed and rate of rotation v=24.8m/s, 120 rev/mins
Answer:
I got you Fam
Step-by-step explanation:
The radius is 12.4 meters if the linear speed and rate of rotation v=24.8m/s, 120 rev/mins.
What is angular acceleration?It is defined as the rate of change in angular velocity with respect to time. It is also known as rotational acceleration.
It is given that:
The rate of rotation v = 24.8 m/s
The angular velocity w = 120 rev/mins
In rev/second
The angular velocity w = (120/60) rev/second = 2 rev/sec
The formula:
v = rw
Here r is the radius
r = v/w
r = 24.8/2
r = 12.4 meters
Thus, the radius is 12.4 meters if the linear speed and rate of rotation v=24.8m/s, 120 rev/mins.
Learn more about angular acceleration here:
https://brainly.com/question/13723307
#SPJ2
(12) - (23 +131) =
Express your answer in the form (a + bi),
Answer:
-142
Step-by-step explanation:
First solve parenthesis,
(12) - (23 +131) =
(12) -154
Finally subtract,
12-154
= -142
What is Three-fourths divided by one-sixth?
Answer:
18/4 or 9/2 or 4 1/2
Step-by-step explanation:
Answer:
9/2 or 4 1/2
Step-by-step explanation:
find the common denominator and divide across.
Need help! only have today till I turn in!
Answer:
yes
Step-by-step explanation:
