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3 years ago

13

On a math test, Janice answers 85% of the questions correctly. If she answered 17 questions correctly, how many questions are on

the test?
Please help me

1 answer:

alex41 [277]3 years ago

5 0

Answer:

20

Step-by-step explanation:

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Kevin bought 3 dvds for 45.99 how much would 7 dvds cost?

Alecsey [184]

Answer:

I am pretty sure the answer would be $107.31. Sorry if I'm wrong.

Step-by-step explanation:

First you take the total of the 3 DVD's (45.99) and you divide that by 3 (number of DVD's) to get 15.33 which is called the unit price. Then, you take your unit price and multiply that by how many items you are going to buy.

45.99 / 3 = 15.33

15.33 x 7 = 107.31

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3 years ago

Helpppp me pleaseeeee!!! This is due in 10 minutes put an explanation pleaseee thank you.

Juliette [100K]

Use cross multiplication

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2 years ago

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makkiz [27]

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3 years ago

(UFRGS) Se 10x = 20y , atribuindo 0,3 para log2, então o valor de é

sveticcg [70]

Answer:

$\frac{x}{y}=1.3$

Step-by-step explanation:

<u>Informação recuperada:</u>

(UFRGS) Se 10x = 20y , atribuindo 0,3 para log 2 , então o valor de x/y é

1) Primeiro, passando o 10 para o 2º membro como base do logaritmo:

$10x=20y \Rightarrow x=log_{10}20y$

2) Aplicando a propriedade do produto de logaritmo:

$log(AB)= logA+logB$

$x=log_{10}20y \Rightarrow x=log(2+10)y\Rightarrow x=(0.3+1)y \Rightarrow x=1.3y$

3) Como quero o quociente divido ambos os lados por y

$\frac{x}{y}=\frac{1.3y}{y}\Rightarrow \frac{x}{y}=1.3$

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3 years ago

ILL GIVE U 20 POINTS AND BRAINLIEST, pls hurry!

serious [3.7K]

Answer:

(1/2,5)

Step-by-step explanation:

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3 years ago