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3 years ago

What is my mystery number???

Mathematics

1 answer:

sukhopar [10]3 years ago

4 0

Answer:

Step-by-step explanation:

Hope this helps :3

(feedback helps me. Dont be afraid to tell me if im wrong) <3

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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

Solve 19.9 = 9 y - 8. Y=

Savatey [412]

The answer would be y = 3.1

19.9 + 8 = 9y

27.9 = 9y

27.9/9 = y

3.1 = y

y = 3.1.

3 0

2 years ago

Brent count to 10 red cards 10 Blackhearts and 20 blue cards in a deck of cards what is the radio of red cards to other cardsj

KonstantinChe [14]

Answer:

1/4

Step-by-step explanation:

10+10+20=40

10 of those are red cards which makes it 10/40 which is simplified to 1/4.

4 0

3 years ago

Read 2 more answers

If X- 6 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the equ

Verdich [7]

The rule, letting d=discriminant:

d>0, two real solutions

d=0, one real solution

d<0, no real solution (but there are two imaginary solutions)

So if it has only one real solution, the discriminant is equal to zero.

6 0

2 years ago

Read 2 more answers

Distributive property simplify each expression -3k + 5k

AnnyKZ [126]

Answer:

k(-3+5)

Hope this helps!

Step-by-step explanation:

If you look closely, you can see that both numbers have the variable k.

If you put a variable and a number together without a sign for example 3q that means that it is multiplying, as to why I put the two numbers in parentheses with the variable.

8 0

3 years ago