You and your friend collect each rocks and fossils. your friend collects three times as many rocks and half as many fossils as you. you collect 20 objects. your friend collects 20 objects. how many rocks andhow many fossils do you each collect. PLEASE ANSWER FAST! I DONT WANNA FAIL!!

Answers

Answer 1

Answer:

you - 4 rocks and 16 fossilsfriend - 12 rocks and 8 fossils

Step-by-step explanation:

Let the rock be r and the fossil be f

Equations

You: r + f = 20Friend: 3r + 1/2f = 20

Double the second equation and subtract the first one:

2(3r + 1/2f) - (r - f) = 2*20 - 206r - r = 205r = 20r = 4

Then find f:

f = 20 - 4 = 16

So you collect 4 rocks and 16 fossils

Friend collects:

4*3 = 12 rocks and 1/2*16 = 8 fossils

Related Questions

wayne'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?

Answers

$13,032.60=X*(1.05)
Divide both sides by 1.05
X is original car price before tax

Car price was $12,412.00

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

Answers

Answer:

7/6

Step-by-step explanation:

trust me i promise this is right

I will give brainliest to the correct answer!

Answers

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?​

Answers

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

Answers

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

Answers

The answer is C)53 hope this helped !

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.​

Answers

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)?

Answers

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

Answers

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?

Answers

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

Answers

The answer is:B because they can’t resolve easy

what was the price of 1 mug before the sale

Answers

tip

I need the hold thing to know the question like or the picture

 please help !!!!!

Answers

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?

Answers

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

Answers

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

Answers

Answer: (D) a law that banned stores from selling violent video games to minors
Pretty sure it's D, just looked it up and it says that the US Supreme Court struck down a 2005 California Law banning the sale of certain violent video games to children without parental supervision. Hope that helped!

What is the acceleration of the bike from 0 seconds to 6 seconds?

Answers

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

Answers

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!!!!!!

Answers

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 lengths

In 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?

Answers

Use the formula H= V/ pi r

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?

Answers

Answer:

24ft. by 40ft

Which of the following is not a rational number?A)22 B) ⅓ C)―16 D) 0.343

Answers

Its 0.343 because it cannot be expressed as a fraction or whole number

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?

Answers

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

Answers

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?​

Answers

That’s is 8cm if u want a


Step-by-step explanation

What is the equation of a line that is parallel to 2x +3y = 3 and passes through the point (3, -4) ?

Answers

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 :)

Answers

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?​

Answers

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

Answers

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

Answers

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.
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