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2 years ago

Brainliest to correct answer

Mathematics

2 answers:

qwelly [4]2 years ago

8 0

Answer:

y = 0.35x

Step-by-step explanation:

Janet ⇒ 3 postcards ⇒ $1.05

Cost of postcard: 1.05/3 = $0.35

Rosi ⇒ 5 postcards ⇒ $1.75

Cost of postcard: 1.75/5 = $0.35

Tanya ⇒ 8 postcards ⇒ $2.80

Cost of postcard: $2.80/8 = $0.35

We see in all 3 cases cost of postcard is same, the cost and numbers are proportional and the relationship is:

y = 0.35x

padilas [110]2 years ago

7 0

y = 0.35x

Step-by-step explanation:

Janet ⇒ 3 postcards ⇒ $1.05

Cost of postcard: 1.05/3 = $0.35

Rosi ⇒ 5 postcards ⇒ $1.75

Cost of postcard: 1.75/5 = $0.35

Tanya ⇒ 8 postcards ⇒ $2.80

Cost of postcard: $2.80/8 = $0.35

We see in all 3 cases cost of postcard is same, the cost and numbers are proportional and the relationship is:

y = 0.35x

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Solve for x: 7x + 5 + x - 3 + x = 5

Soloha48 [4]

Answer:

x=1/3

Step-by-step explanation:

9x+5-3=5

9x=3

x=1/3

6 0

2 years ago

Read 2 more answers

Your class raised money by selling hot dogs and hamburgers. Hot dogs were sold for $.50 (fifty cents), and hamburgers were sold

LenKa [72]

Answer:

Number of hot dogs sold = 56

Number of hamburgers sold = 52

Step-by-step explanation:

Let

Number of hot dogs sold = x

Number of hamburgers sold = y

We can make equation from given equations:

$0.50x+1y=80$ (Hot dogs were sold for $.50 (fifty cents), and hamburgers were sold for $1 (one dollar). The total money raised by your class was $80. )

$x+y=108$ (Together you sold 108 hot dogs and hamburgers.)

Now we cam solve these system of equations to find value of x and y

$0.50x+y=80--eq(1)\\x+y=108--eq(2)$

Subtract both equations to get value of x:

$0.50x+y=80\\x\:\:\:\:\:\:\:\: + y=108\\-\:\:\:\:\:\:\:\: -\:\:\:\:\:\: -\\---------\\-0.5x=-28\\x=\frac{-28}{-0.5}\\x=56$

We get value of x = 56

Now putting value of x in equation 2 to find value of y

$x+y=108\\56+y=108\\y=108-56\\y=52$

So, we get y = 52

Therefore,

Number of hot dogs sold = x = 56

Number of hamburgers sold = y = 52

6 0

2 years ago

What is the formula for the circumferences of a circle in terms of r?

Paha777 [63]

Answer: Pi · 2r

Step-by-step explanation:

The standard formula to find the circumference of a circle is Pi times the diameter of the circle. The diameter is 2 times the radius, which is what you're going to use in the formula.

So instead of Pi times the diameter, we have Pi times 2 times the radius. Thus, the formula is Pi · 2r.

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2 years ago

Over 6 days jim jogged 6.5 miles 5 miles 3 miles 2 miles 2 miles 3.5 miles and 4 miles. What is the mean distance that jum jogge

Marizza181 [45]

Mean means average.

To find the average, add the data then divide it by the amount of individual data you have.

(6.5 + 5 + 3 + 2 + 2 + 3.5 + 5)/2 = mean

27/2 = mean

13.5 = mean

13.5 miles is the mean distance that Jim jogged.

5 0

2 years ago

6) Which is the best deal? 3.45 lbs for $3.58 $10.23 for 10.43 lbs

kirill115 [55]

Answer:

3.45 lbs for $3.58 because your getting 3 pounds of the item for 3 dollars.

Step-by-step explanation:

3.45 lbs for $ 3.58 is cheaper than 10.43 lbs for 10.23

5 0

2 years ago