Answer:
Hence the weight of chalk stick is 25 g.
Explanation:
Let the weight of a stick be x gm.
12% of x=3
(12/100)*x=3
x=3*(100/12)=25 g
Answer:
weight of chalk = 25gStep-by-step explanation:
let chalk contains 10x calcium, 3x carbon, 12x oxygen.
percentage of carbon in the chalk:
= 3x x 100
10x + 3x + 12x
= 3x ( 100 )
25x
= 3 (4)
= 12%
Now, we know that carbon has 12% of chalk.
weight of carbon = 12% x weight of chalk. ------------- equation
plugin values into the equation:
3 = 12% (weight of chalk)
3 = 12 (weight of chalk)
100
12 (weight of chalk) = 3
100
weight of chalk = 3 (100)
12
weight of chalk = 25g
4/12 equals how many thirds?
a. 0/3
b. 1/3
c. 2/3
d. 4/3
Answer:
noshe
Step-by-step explanation:
2= 5 j -28 one or two step equation
Answer:
j=6
Step-by-step explanation:
2=5j-28
+28 +28
30=5j
/5 /5
j=6
Live earns $9.50 for every two bracelets she sells. The equation y=4.75x ,where x represents the number of bracelets and y represent t total cost in dollar earned.represents this situation.what is the constant of prop rationality? What does the constant of proptionality represent in the contexts of the problem?
Answer:
Price of each bracelet = $4.75
Step-by-step explanation:
Given:
y =4.75x
In equation;
y = kx
where k is constant
So , we say that 4.75 is constant of proportionality
So price of each bracelet = $4.75
At her birthday party, Ms. Willow would not give her age directly. She said, 'If you add the year of my birth to this year, subtract the year of my 25th birthday and the year of my 55th birthday, and then add my present age, the result is 58.
Answer:
69 years
Step-by-step explanation:
Given that:
Let year of birth = x
This year = 2020
Year of 25th birthday = x + 25
Year of 55th birthday = x + 55
Present age = 2020 - x
Hence,
x + 2020 - (x + 25 + x + 55) + (2020 - x) = 58
x + 2020 - (2x + 80) + (2020 - x) = 58
x + 2020 - 2x - 80 + 2020 - x = 58
-2x + 4040 - 80 = 58
-2x + 3960 = 58
-2x = 58 - 3960
-2x = - 3902
x = 1951
Birth year = 1951
,
Hence, age =
2020 - 1951 = 69 years
squareroot of -66 is?
Answer:
8.1240384 i
Step-by-step explanation:
Answer:
It doesn't have a square root
Step-by-step explanation:
All negative numbers don't have a square root. Because you would have to use a negative and a positive number, and that is not possible when squaring a number. For example, 8² = 64, but what is the square root of -64 there isn't one because if you did -8² = 64. So No Square Root.
Find the value of x. -2x + 6 = 4(x + 6)
Answer:
x = -3
Step-by-step explanation:
Answer:
-3
Step-by-step explanation:
To find the value of x, you need to get rid of parentheses! So, 4*x=4x. 6*4=24. Now we have, -2x+6=4x+24. Then we want to get all the x on one side, and the other numbers on the other side. We can add -2x to make it 0, but to make it equal, you need to add it to the other side. So, 4x+2x=6x. You can subtract 24 too! After we do all that, we get: -18=6x. To get x, we need to divide by 6. 6x/6=x. -18/6=-3.
What is the formula of the compound formed from Cobalt(lll) and lodine?
Answer:
Cobalt (III) iodide CoI₃
Step-by-step explanation:
The name of the compound formed between Cobalt(III) and Iodine is known as Cobalt (III) Iodide.
The Iodide ion gains three electrons from the cobaltThey both an electrovalent compound when they react.This compound is soluble in water due to the ionic bonds. Cobalt is a transition metal found in the d- blockIodide is a halogen that belongs to group 7.What is the area, in square centimeters, of the shape below?
Answer:
21.46 cm squared
Step-by-step explanation:
3.8x5.8=21.46
What is the equation of a line with a slope of -2 that passes through the point (6, 8)?
O 2x + y = 20
O y-2x = 4
O y-2x = 20
O 2x + y = 4
Answer:
2x + y = 20
Step-by-step explanation:
gradient = -2
x = 6, y = 8
y - 8 = -2(x - 6)
y - 8 = -2x + 12
2x + y = 12 + 8
2x + y = 20
Answer:
2x + y = 20Step-by-step explanation:
hope that will help youthe rational number 9.8 is the best approximation to the tenth of which irrational number?
89 squared
92 squared
96 squared
98 squared
I WILL AWARD BRAINIEST PLEASE HELP
Answer:
12
Step-by-step explanation:
zeros are the x-intercepts of any function. to find the x-intercept of this given function, we have to set y equal to 0.
0= -1/2x+6
-6=-1/2x
12=x
x=12
the x-intercept is (12,0), meaning 12 is the zero of this function.
A 50 mile trip uses 2 gallons of gas. How much gas would you use on a 125 mile trip?
Answer:
5o mile trip=2 gallon
50÷2=25
1 mile trip=25
so 125÷25=5
5 gallon of gas use
1+1+1+1+1000+8364+20484923743 - 24762837763
-4,277,904,652 would be the correct answer
Are the two lines parallel, perpendicular, or neither?
Graph 1
Graph 2
Graph 3
Graph 4
Answer:
Graph 1: Parallel
Graph 2: Perpendicular
Graph 3: Neither
Graph 4: Neither
Answer:
Graph 1: parallel
Graph 2: Perpendicular
Graph 3: Neither
Graph 4: Neither
Step-by-step explanation:
The ones that are neither would technically be labeled intersecting just for future reference but it is not required in this problem. Hope this helps!
Sara and Gordon win some money and share it in the ratio 5:3. Sara gets £30 more than Gordon. How much did Gordon get?
Answer:
45
Step-by-step explanation:
if Sara has 30 more than Gordon and the ratio is 5:3. then sara has 2× X more than Gordon. 30 ÷ 2 = 15.
15 = X
15 × 3 = 45
Sara has 75
(sorry if it's confusing)
(a) Books to authors
(b) SIM cards to cell phone numbers
(c) True or False questions to answers
(d) Books to its ISBN
are one to one fuction?
Answer:Letter D.
Step-by-step explanation:
One day for 3000 days my dog talked for about 5 1/2 hours. How many hour had my dog talked for.
A. 16500
B. 10000
C. 90
D. 5000
Answer:
u457sups
Step-by-step explanation:
= 89 - 89b 67 = 80
Answer:
A
Step-by-step explanation:
What is arccos(−1) in Radians.
Answer:
π radians
Step-by-step explanation:
The arc cos(- 1) in degrees is 180° and 180° = π radians
the cost, c(x) for a taxi ride is given by c(x) = 3x + 2.00 where x is the number of minutes.
on a piece of paper, graph c(x) = 3x + 2.00. then determine which answer matches the graph you drew, including the correct axis labels.
Answer:
C
Step-by-step explanation:
Because its a cost vs minutes graph, and it starts at (0,2) and goes to (1,5)
Answer:A
Step-by-step explanation:
fastest land animal in the world answers
Answer:
Cheetah
Step-by-step explanation:
The cheetah or the Acinonyx jubatus can run up to 50 - 80 mph on land
Brainliest?
Question 7(Multiple Choice Worth 1 points)
(01.05 MC)The total charge on 4 particles is -36 units. All the particles have the same charge.
What is the charge on each particle?
0-9 units
-8 units
08 units
9 units
Answer:
-9 units
Step-by-step explanation:
[tex] - \frac{36}{4} = - 9 \\ [/tex]
-X/3=9 linear equations
Answer:
x = -27
Step-by-step explanation:
-x/3 = 9
Multiply each side by -3
x/-3 * -3 = 9*-3
x = -27
See attachment for math work and answer.
x−1.2=3 i dont understand this stupid math problem
Answer: If you have to solve for X the answer is x=4.2
Step-by-step explanation:
I need help with this stupid question, my teacher got me confused when he kept talking about different things!
Answer:
2 5/8
Step-by-step explanation:
1 3/4 + 7/8
add the fractions together
look for the lcm bwt 4 and 8
1 6 + 7
____
8
= 13/8 = 1 5/8
1 + 1 5/8
= 2 5/8
x + 2y = 23
A.(15,-4)
B.(-15,4)
C.(15,4)
Answer:
23
Step-by-step explanation:
232323
3
3
3
3
23
23
3
this isnt correct btw
What’s is the answer for 9-(-3)
Answer:
negative times A negative is a positive so your answer is 27
Step-by-step explanation:
I need help in this, the result should give 17
someone please help me
Answer:
X= 20
Step-by-step explanation:
x/5 + 13 = 17
x/5 + 13 =17
- 13. -13
x/5×5 4×5=20
So X=20
Are these lines parallel,
perpendicular, or neither?
Line 1 passes through (0,3) and (3,1)
Line 2 passes through (-1,4) and (-7,-5)
Use f(x) = 1/2x and f -1(x) = 2x to solve the problems.
f(2) =
f−1(1) =
f−1(f(2)) =
[tex]f(2) = \frac{1}{2} \times 2 = 1\\f^{-1}(1) = 2 \times 1 = 2\\f^{-1}(f(2)) = f^{-1}(1) = 2[/tex]
Note: [tex]f^{-1}(f(x)) = x[/tex] because f -1 and f cancel each other out.
Answer:
f(2) =
⇒ 1
f−1(1) =
⇒ 2
f−1(f(2)) =
⇒ 2
f−1(−2) =
⇒ -4
f(−4) =
⇒ -2
f(f−1(−2)) =
⇒ -2
Step-by-step explanation:
The denarius was a unit of currency in ancient Rome. Suppose it costs the Roman government 101010 denarius per day to support 333 legionaries and 333 archers. It only costs 333 denarius per day to support one legionary and one archer. Use a system of linear equations in two variables.
Complete question :
The denarius was a unit of currency in ancient Rome. Suppose it costs the Roman government 10 denarius per day to support 3 legionaries and 3archers. It only costs 3 denarius per day to support one legionary and one archer. Use a system of linear equations in two variables. Can we solve for a unique cost for each soldier?
Answer:
No unique solution
Step-by-step explanation:
Given that:
Cost of supporting 3 legion aries and 3 archers = 10 denarius daily
Cost of supporting one legionary and one archer = 3 denarius
Let:
Legionaries = l ; archers = a
Equation for the first sentence :
3l + 3a = 10 - - - (1)
Second sentence :
l + a = 3 - - - - - (2)
From (2)
l = 3 - a
Substituting l = 3 - a into (1)
3(3 - a) + 3a = 10
9 - 3a + 3a = 10
9 - 0 = 10
The variable cancels out, Hence, ( there is no unique solution to find the cost of each soldier)
Answer:
No; the system has no solution.
Step-by-step explanation:
We'll use L to represent the cost per day of a legionary, and we'll use A to represent the cost per day of an archer. So we have the following system of equations:
3L+3A=10
L+A=3
If we multiply both sides of the second equation by 3, we get the equation 3L+3A=9
But this indicates that the cost to support 3 legionaries and 3 archers is 9 denarius. The first equation indicates that it costs 10 denarius to support 3 legionaries and 3 archers.
The cost cannot be 9 denarius and 10 denarius at the same time.
Henceforth the answer is:
No; the system has no solution.