radius is always half the length of its diameter. For example, if the diameter is 4 cm, the radius equals 4 cm ÷ 2 = 2 cm.
Diameter:2 times the radius is the circle's diameter.
Circumference:The formula is simply this: C = πd. In this equation, "C" represents the circumference of the circle, and "d" represents its diameter. That is to say, you can find the circumference of a circle just by multiplying the diameter by pi.the formula for circumference of a circle is 2 x pi x r(radius).
Can somebody help me with this question. Will mark brainliest.
Answer:
the two triangles arent similar
Step-by-step explanation:
In order for the two triangles to be similar the sides GR and RA and SR and ST have to have the same ratio and they don't because 45/18 is 4.5 and 36/15 is 2.4.
Why is graphing the best method to solve the following system of equations?
y= 3x + 1
y=x+5
Answer:
because all the numbers used are whole numbers and as a result will appear clearly on a graph. if there were decimals you would need to estimate and the answer would not be accurate
someone please help me with this it’s due today and explain too
Answer:
D
Step-by-step explanation:
Step-by-step explanation:
you can use the app photo math or mathaway. its help alot the app also explains the work
which of the following represents an element
A O
2
B H2O
C CO2
D NO2
Answer:
I believe the answer is O2
Answer:
A. Correct
B. Incorrect
C. Incorrect
D. Incorrect
Step-by-step explanation:
B, C, and D are compounds rather than elements
Write an equation of the line in slope-intercept form through the given points: (0, 2) and (3, 3).
PLEASE HELP !! i suck at math
verifyexperimentally sum of angle of quadrilateral is 360 degree
No.of sides=4
sum of angle of quadrilateral
=(n-2)*180°
=(4-2)*180°
=2*180°
=360°
TRUE OR FALSE:
5(3t - 6) = 15t - 30
Answer:
im not 100% sure but i think its false
Step-by-step explanation:
Which expressions are quadratic expressions? Check all that apply.
z2
2x + 7x – 10
2x2 + 9x – 7
500(0.25)t – 1
13x3 + 21x2 – 5
Answer:
Step-by-step explanation:
the quadratic expression is
2x^2+9x-7
this is the only one
Answer:
2x^2+9x-7
Step-by-step explanation:
3(b+1) +1 = 4b
please hurry i need it now
Answer:
4=b
Step-by-step explanation:
3b+3+1=4b
3b+4=4b
-3b -3b
4=b
PLEASE SOMEONE HELP
solve the equations using substitution method and SHOW YOUR WORK
A. y = 2x + 1
5x + y = 15
B. y = x + 7
4x + 3y = -7
C. y = 1
6x - 8y = 28
D. 2x - 3y = 16
4x + y = 4
Which method do you prefer to use: Trig Method or Special Right Triangles
Answer:
would use the Trig Method.
Step-by-step explanation:
Solve for please :):)
Answer:
x=20
Step-by-step explanation:
x+2x+x+10=90
4x+10=90
4x=90-10
4x=80
x=80/4
x=20
may someone help me with this?? QUESTION: Write the phrase as an expression 5 times a number d An expression is. i put already d-15 but it was wrong so yes i need help
Answer:
5d
Step-by-step explanation:
five time a number d
5 x d
5d
Please help me with the correct answer
n this assignment, you will explore how to find the number of different species of fish in a pond by looking at a random sample of the fish.
Which phrase best describes the total number of brook trout in the pond?
the population of brook trout
the proportion of brook trout
the sample of brook trout
the population of fish
Answer:the population of brook trout
Step-by-step explanation:
A tree is 4
541 feet tall. It is expected to grow by 1 feet per year.
At this growth rate, how many years will it take for the tree to have a height greater than 40 feet? Enter the answer in the box.
years
Answer:
21 years
Step-by-step explanation:
80 books to 64 books. What's the percent of change?
Answer:
A change from 64 to 80 represents a positive change (increase) of 25%
Step-by-step explanation:
Element X is a radioactive isotope such that every 27 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 7900 grams, how much of the element would remain after 12 years, to the nearest whole number?
Answer:e
Step-by-step explanation:
Answer:
5805
Step-by-step explanation:
1kg petrol has density of 800kg/m3 find its volume in cm 3
Answer:
1.25*10-3m^3
Step-by-step explanation:
1kg petrol has density of 800kg/m3 find its volume in cm 3
Given data
mass m= 1kg
density = 800kg/m3
Required
The volume v
We know that
density= mass/volume
so
Volume= mass/density
substute
Volume= 1/800
volume=1.25*10-3m^3
Hence the volume is 1.25*10-3m^3
Please help me with this x+125+d=1,245
Answer:
x=1120-d
Step-by-step explanation:
Answer:
x = 1120 - d
Step-by-step explanation:
Hi there!
We can simplify this using orders of operations.
First, subtract 125 from both sides to get x + d = 1120.
To isolate x, just subtract d from both sides.
If you give me a value for d, i can solve the full problem.
I hope this helps!
help me please on this math question
Answer:
729 * 10^-45
Step-by-step explanation:
Here, we want to expand the value based on the exponent
We have the power multiplying every term in the bracket
That would be;
9^3•10^-45
= 729 * 10^-45
Jenna often babysits to earn extra money. On Friday night, she made $42 for babysitting 3 hours. On Saturday night she made $63 for babysitting 4.5 hours
Answer:
4 hours
Step-by-step explanation:
I'll give brainliest!!!! help!
The area, A, in square feet, of the base of a rectangular storage bin in a warehouse is given by the function A(x) = -2x2+ 36x, where x is the width, in feet, of the storage bin.
Part A: Which of the following statements would be TRUE?
A.
The x-intercepts of the function are 0 and 8, which are a lower bound and an upper bound for the possible values of the length of the storage bin.
B.
The x-intercepts of the function are 0 and 18, which are a lower bound and an upper bound for the possible values of the length of the storage bin.
C.
The x-intercepts of the function are 0 and 8, which are a lower bound and an upper bound for the possible values of the width of the storage bin.
D.
The x-intercepts of the function are 0 and 18, which are a lower bound and an upper bound for the possible values of the width of the storage bin.
Answer:
It’s D bro
Step-by-step explanation:
I’m doing the exact test rn it’s d trust
Answer:
C or D, but mostly D
Step-by-step explanation:
It's either C or D because I know the intercepts are 0 and 18. It says where X is the width so My final Answer would be D
PLEASE HELP ME I NEED TO PAST THIS TEST. Jack invests $30,000 with an interest rate of 4.5% compounded quarterly. After 6 years, what is the total amount of Jack's investment?
Enter your answer in the box rounded to the nearest cent.
Answer:
1350
Step-by-step explanation:
Hope this helps!
What do you call a person with dog ears and tail
Answer:
a dog
Step-by-step explanation:
Answer:
Dunno...Dog-man?
Step-by-step explanation:
Lemme think about that
HeLp meee NeOW If DONT U WILL SUFfEr SEVERE consequences...
The lower a county's economic development, the
A) higher the literacy rate.
B) higher the cost of living.
C) higher costs of education.
D) lower the infant mortality rate.
Answer:
B
Step-by-step explanation:B
Answer:
the answer to this question is B
trigonometry help!! - double angle formulae
Answer:
The two rules we need to use are:
Sin(a + b) = sin(a)*cos(b) + sin(b)*cos(a)
cos(a + b) = cos(a)*cos(b) - sin(a)*sin(b)
And we also know that:
sin^2(a) + cos^2(a) = 1
To solve the relations, we start with the left side and try to construct the right side.
a) Sin(3*A) = sin (2*A + A) = sin(2*A)*cos(A) + sin(A)*cos(2*A)
sin(A + A)*cos(A) + sin(A)*cos(A + A)
(sin(A)*cos(A) + sin(A)*cos(A))*cos(A) + sin(A)*(cos(A)*cos(A) - sin(A)*sin(A))
sin(A)*cos^2(A) + sin(A)*cos^2(A) + sin(A)*cos^2(A) - sin^3(A)
3*sin(A)*cos^2(A) - sin(A)*sin^2(A)
sin(A)*(3*cos^2(A) - sin^2(A))
Now we can add and subtract 4*sin^3(A)
sin(A)*(3*cos^2(A) - sin^2(A)) + 4*sin^3(A) - 4*sin^3(A)
sin(A)*(3*cos^2(A) + 3*sin^2(A)) - 4*sin^3(A)
sin(A)*3*(cos^2(A) + sin^2(A)) - 4*sin^3(A)
3*sin(A) - 4*sin^3(A)
b) Here we do the same as before:
cos(3*A) = 4*cos^3(A) - 3*cos(A)
We start with:
Cos(2*A + A) = cos(2*A)*cos(A) - sin(2*A)*sin(A)
= cos(A + A)*cos(A) - sin(A + A)*sin(A)
= (cos(A)*cos(A) - sin(A)*sin(A))*cos(A) - ( sin(A)*cos(A) + sin(A)*cos(A))*sin(A)
= (cos^2(A) - sin^2(A))*cos(A) - sin^2(A)*cos(A) - sin^2(A)*cos(A)
= cos^3(A) - 3*sin^2(A)*cos(A)
= cos(A)*(cos^2(A) - 3*sin^2(A))
now we subtract and add 4*cos^3(A)
= cos(A)*(cos^2(A) - 3*sin^2(A)) + 4*cos^3(A) - 4*cos^3(A)
= cos(A)*(-3*cos^2(A) - 3*sin^2(A)) + 4*cos^3(A)
= cos(A)*(-3)*(cos^2(A) + sin^2(A)) + 4*cos^3(A)
= -3*cos(A) + 4*cos^3(A)
can anyone please help ME!:)
Answer:
x y
0 0 - this is the y intercept
1 -4
2 -8
3 -12
4 -16
Step-by-step explanation:
Please!!! I’ll mark Brainliest!! I really need help!!!
Answer:
[tex] (x, \: \: y) = (4, \: \: - \frac{1}{4} )[/tex]
Step-by-step explanation:
[tex] \frac{1}{4} x + \cancel{ 1 \frac{1}{2} y} = \frac{5}{8}...(1) \\ \\ \frac{3}{4} x - \cancel{ 1 \frac{1}{2} y} = 3 \frac{3}{8} ...(2) \\ - - - - - - - - - \\(adding\: equations\: 1 \:\&\:2) \\ ( \frac{1}{4} + \frac{3}{4} )x = \frac{5}{8} + 3 \frac{3}{8} \\ \\ \frac{4}{4} x = \frac{5}{8} + \frac{27}{8} \\ \\ x = \frac{32}{8} \\ \\ x = 4 \\ \\ plug \: x = 4 \: in \: equation \: (1) \\ \\ \frac{1}{\cancel 4} \times \cancel 4 + 1 \frac{1}{2} y = \frac{5}{8} \\ \\ 1 + \frac{3}{2} y = \frac{5}{8} \\ \\ \frac{3}{2} y = \frac{5}{8} - 1\\ \\ \frac{3}{2} y = \frac{5 - 8}{8}\\ \\ \frac{3}{2} y = \frac{ - 3}{8}\\ \\ y = \frac{ - 3}{8} \times \frac{2}{3} \\ \\ y = \frac{1}{4} \\ \\ (x, \: \: y) = (4, \: \: - \frac{1}{4} )[/tex]
