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3 years ago

Help I can’t get the right answer

Mathematics

1 answer:

Basile [38]3 years ago

3 0

3 * 0.28 + 0.38y = the total cost

Step-by-step explanation:

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Which situation represents a proportional relationship?

Natalka [10]

Answer:

B) Jack biked 5 miles in 25 minutes and 8 miles in 40 minutes.

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y=kx$

The ratio between the two variables is a constant called constant of proportionality k

$k=y/x$

Verify each case

A) Julie sold 4 necklaces for $12 and 9 necklaces for $25.

$\frac{4}{12}=\frac{9}{25}$

Multiply in cross

$4(25)=9(12)\\100\neq108$

Is not true

therefore

The situation not represent a proportional relationship

B) Jack biked 5 miles in 25 minutes and 8 miles in 40 minutes.

$\frac{5}{25}=\frac{8}{40}$

Multiply in cross

$5(40)=8(25)\\200=200$

Is true

therefore

The situation represent a proportional relationship

C) Larry packed 24 apples in 6 boxes and 46 apples in 9 boxes

$\frac{24}{6}=\frac{46}{9}$

Multiply in cross

$24(9)=46(6)\\216\neq276$

Is not true

therefore

The situation not represent a proportional relationship

D) Allie put 14 pieces of candy in 2 bags and 30 pieces of candy in 4 bags

$\frac{14}{2}=\frac{30}{4}$

Multiply in cross

$14(4)=30(2)\\56\neq60$

Is not true

therefore

The situation not represent a proportional relationship

7 0

3 years ago

Mason cuts a giant circular cookie into 5 equal pieces. Which statements are true about the angle measures of the pieces?

Jobisdone [24]

Answer:

A statement that is true about the angle measures of the pieces is that the angle measure of each piece is 72°. This is because there are 360° in a full circle, and if each piece is equal, that means that each piece is a fifth of that. Therefore, the angle measure is 360/5= 72°

6 0

2 years ago

Diane's cat has a tail that is 48 centimeters long. How many millimeters is the length of the tail?

Romashka [77]

Answer:

480 millimeters

Step-by-step explanation:

Step 1: Convert centimeter to millimeter

1 centimeter = 10 millimeters

48 * 10 = 480 millimeters

Answer: 480 millimeters

5 0

3 years ago

Altogether, Alicia has to drive 104 miles on the turnpike.

omeli [17]

30 miles (104-74). Or 104 if the first 74 miles was not on the turnpike xd

6 0

2 years ago

This is another math thingy

andriy [413]

Answer:

7.15 (two sig figs)

Step-by-step explanation:

There is a time limit dude, googling is a faster way

1. Area of rectangle

A = l*z

2. Find z

93 = 13*z

z ≈ 7.15

8 0

3 years ago

Read 2 more answers