Answer:
you - 4 rocks and 16 fossilsfriend - 12 rocks and 8 fossilsStep-by-step explanation:
Let the rock be r and the fossil be f
Equations
You: r + f = 20Friend: 3r + 1/2f = 20Double the second equation and subtract the first one:
2(3r + 1/2f) - (r - f) = 2*20 - 206r - r = 205r = 20r = 4Then find f:
f = 20 - 4 = 16So you collect 4 rocks and 16 fossils
Friend collects:
4*3 = 12 rocks and 1/2*16 = 8 fossilswayne's country has a sales tax rate of 5%. How much does mike's car cost before tax if the total cost of the car plus tax is 13,032.60?
A percentage is a way to describe a part of a whole. The cost of the car is $12,412.
What are Percentages?A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.
To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.
Given that Wayne's country has a sales tax rate of 5%. The total cost of the car plus tax is $13,032.60. Therefore, the total cost of the car can be written as,
The total cost of the car = Cost of the car + Tax on the car
$13,032.60 = Cost of the car + 5% of the cost of the car
Let the cost of the car be represented by x.
$13,032.60 = x + 5% of the x
$13,032.60 = x + 0.05
$13,032.60 = 1.05x
x = $13,032.60 / 1.05
x = $12,412
Hence, the cost of the car is $12,412.
Learn more about Percentages here:
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Help cri cri will give brainly
Answer:
7/6
Step-by-step explanation:
trust me i promise this is right
I will give brainliest to the correct answer!
Answer:
c). 2x^3 x ^3[tex]\sqrt{4}[/tex]
Step-by-step explanation:
i hope this is correct! have a good day! c:
Sophia bought 24 chicken wings for $52.80. How much does each wing cost?
Answer:
2.2$
Step-by-step explanation:
Because 52.80 divided b 24 equals 2.2$
have a nice day! :>
A ship captain is mapping a trip and wants to know the distance the ship will travel over certain time intervals.
Assuming that the ship travels at a constant speed, what is its speed? Show your thinking. PLZ HELP
Answer: speed (s) = distance (d) divided by time (t)
Step-by-step explanation: You can see that every 30 minutes or 0.5 hours, the ship's distance increases by 12.5 miles. The problem even say the ship's speed is constant...so it doesn't matter which numbers you use for your calculation just used the time with the corresponding distance.
Angles X and Y form a linear pair. If the measure of angle X = 3x + 127 and the measure of angle Y = 5x - 11, find the measure of angle Y.
A)8
B)29
C)53
D)161
At store A, rulers are sold individually. The cost y of x rulers is represented by the equation y = 0.95x. The costs of rulers at store B are shown in the table. Number of Rulers (x) Cost (y) 5 $4.60 10 $9.20 15 $13.80 20 $18.40 Use the slope of each store to determine which store charges more per ruler. Explain.
Answer:
The ruler at store A cost more
Step-by-step explanation:
Ruler A=$0.95 per ruler
Ruler B=$0.92 per ruler
The function g(x) is graphed on the coordinate grid. What is the domain of g(x)?
Answer:
x[tex]\geq[/tex]5
Step-by-step explanation:
The domain is the function defined on your x-axis.
It starts from 5 and includes 5
so the domain is x[tex]\geq[/tex]5
Rewrite in simplest terms: 4(-6t – 3) - 10t
Step-by-step explanation:
4(-6t-3)-10t
-24t-12-10t
-12-24t-10t
-12-34t
$1400 is divided between two accounts. One account pays $3%$ interest, while the other pays $4%$. At the end of the interest period, the interest earned was $50. How much was invested in each account?
Answer:
$60
Step-by-step explanation:
one of them got $40 and the other one $20
Which line is parallel with the line y = -4x + 2?
A. 4x + y = -5
B. -4x + y = 5
C. -x + 4y = 2
D. x + 4y = -2
what was the price of 1 mug before the sale
tip
I need the hold thing to know the question like or the picture
 please help !!!!!
Answer:
135 degrees
This is because 180 - 45 = 135
Answer:
C. 135
Step-by-step explanation:
180-45=135
Susan purchased a prepaid phone card for $15. Long distance calls cost 14 cents a minute using this card. Susan used her card only once to make a long distance call. If the remaining credit on her card is $9.26, how many minutes did her call last?
Answer:
41 minutes
Step-by-step explanation:
Step one:
given data
Susan purchased a prepaid phone card for $15
let the number of minutes be x
and let the total be y
per minute call cost = 14 cents = $0.14 per minute
Hence the expression for the situation is given as
y= 15-0.14x
Step two:
given that the balance after a call is 9.26
9.26=15-0.14x
solve for x
9.26-15= -0.14x
5.74=0.14x
divide both sides by 0.14
x=5.74/0.14
x=41 minutes
i need to know the answer
Answer:
A.
Step-by-step explanation:
Combine 7 and -3 to get 4
4+7xy is the answer
Answer:
Yes, you can combine the 7 and the -3. Simplified expression is 4 + 7xy
Step-by-step explanation:
1
What California law did the U.S. Supreme Court recently overturn?
A
a law that required minors to stop playing violent video games
B
a law that made it a criminal offense to sell violent video games
С
a law that banned violent video games from all stores in California
D
a law that barred stores from selling violent video games to minors
What is the acceleration of the bike from 0 seconds to 6 seconds?
Answer:
3mph
Step-by-step explanation:
Please help me. I will mark you as brainliest !!!
Explain how the graph of each given function is a transformation of the graph
of y = x^2
a. y = x^2 -5
b. y = -2x^2
C. y = (x - 5)^2
d. y = (-3x)^2
Answer:
A.) The function is being translated down 5 units
B.) The function is being stretched vertically stretched by 2 units
C.) He function is being translated 5 units to the right
D.) The functions being flipped and vertically stretched by 3 units
Hope this helps in some way!
PLEASE HELP!!!!! 25 POINTS!!!!!!
Answer:
The values of x and y that make the quadrilateral is a parallelogram are x = 12 and y = 21
Step-by-step explanation:
In the parallelogram, every two opposite sides are equal in lengthsIn the given figure
If DEFG is a parallelogram, then DE = GF and DG = EF
∵ DE = GF
∵ DE = 6x - 12 and GF = 2x + 36
→ Equate them
∴ 6x - 12 = 2x + 36
→ Subtract 2x from both sides
∵ 6x - 2x - 12 = 2x - 2x + 36
∴ 4x - 12 = 36
→ Add 12 to both sides
∵ 4x - 12 + 12 = 36 + 12
∴ 4x = 48
→ Divide both sides by 4
∴ x = 12
∵ DG = EF
∵ DG = 6y - 42 and EF = 4y
→ Equate them
∴ 6y - 42 = 4y
→ Add 42 to both sides
∵ 6y - 42 + 42 = 4y + 42
∴ 6y = 4y + 42
→ Subtract 4y from both sides
∵ 6y - 4y = 4y - 4y + 42
∴ 2y = 42
→ Divide both sides by 2
∴ y = 21
∴ The values of x and y that make the quadrilateral is a parallelogram are
x = 12 and y = 21
how do you find the height of a cylinder when given the surface area and the diameter?
The scale drawing of a building measures 3 in. by 5 in. The scale is ¼ in = 2 feet. What is the area of the actual building?
Answer:
24ft. by 40ft
Which of the following is not a rational number?A)22 B) ⅓ C)―16 D) 0.343
You work as a taxi driver. you earn an average of $75 in tips everyday.
Which graph best represents the relationship between time and the cumulative total of your tips?
Answer:
A
Step-by-step explanation:
it should be A because if
x-axis represents the time, at the beginning of the day x = 0 and
y-axis the $, at the beginning of the day should be y= 0
Answer:
a linear graph would best represent the relationship
Step-by-step explanation:
just did the khan academy thing
Ella buys 5 packs of muffins. She uses a coupon and saves $3 off the total. Which expression represents her total cost?
A. 5m -3
B. 5 -3m
C.5+3
D. 5m + 3
Answer:
The answer is A. 5m - 3
Step-by-step explanation:
Ella bought 5 packs of muffins but since we don't know how many muffins are in each pack, we put a variable in place so it's 5m. Since she saved $3 off the total, that means you would subtract 3 from the total, so the problem would be 5m - 3
Six segments form two triangles. AB = 3 cm, FE =11cm, CB = 9 cm, DE = 9 cm, CA=11 cm, and FD = 3 cm. (a) Write a triangle congruency statement. (b) What postulate guarantees that these triangles are congruent?
What is the equation of a line that is parallel to 2x +3y = 3 and passes through the point (3, -4) ?
Answer:
2x + 3y = -6
Step-by-step explanation:
The equation of the new line will be identical to that of the given line except that the constant term will differ.
Start with the given 2x + 3y = 3 and replace x with 3 and y with -4. We get:
2(3) + 3(-4) = C, and C = 6 - 12 = -6
The equation of the new line is therefore 2x + 3y = -6
50 points! No wrong answers please! Will mark brainliest :)
Answer:
I'm pretty sure it's the 1 or tha last one
Answer:
[tex]y=\frac{1}{4}x-1[/tex]
Step-by-step explanation:
Parallel lines always have equal slopes. Therefore, this eliminates two options and we just need to find the y-intercept. Since the line passes through [tex](-4,-2)[/tex], we have:
[tex]-2=\frac{1}{4}(-4)+b,\\b=-1[/tex].
Therefore, the equation of the line is:
[tex]y=\frac{1}{4}x-1[/tex]
AA two-story building measures 21 feet from the ground. A scale model shows the building to be 3 inches tall. How many inches would an 84 foot building be in the model?
Answer:
12 inches
Step-by-step explanation:
21 feet = 3 inches (in a model)
84 feet = 12 inches (in a model)
84 ÷ 21 = 4
3 × 4 = 12
Need answer fast as possible
Answer:15
Step-by-step explanation:
The box on the left is square in a square all side are equal
Answer:
15
Step-by-step explanation:
That's a square, so all lengths are the same
X^2+2x+1=4 complete the square
Answer:
[tex] {x}^{2} +2 x + 1 = 4 \\ {(x + 1)}^{2} = 4 \\( x + 1) = + 2 \: and \: (x + 1) = - 2 \\ \boxed{x = 1 \: and \: x = - 3}[/tex]
x= 1 or x= -3 is the right answer.