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vodka [1.7K]
3 years ago
15

Rebecca owns nonfiction books and fiction books. The ratio of nonfiction books to fiction is 7:2. Rebecca owns 54 books. How man

y nonfiction books dose she own?
Mathematics
1 answer:
Bess [88]3 years ago
3 0

Answer:

42 books

Step-by-step explanation:

The ratio percent for nonfiction is 0.78%

You multiply the amount of book by the percent that is nonfiction which give you the answer of 42.

54(0.78) = 42

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Simplify the expression to a + bi'form:<br> (1 - 5i)(5 +6i)
lions [1.4K]

(1 - 5i)(5 + 6i) \\  = 5 + 6i - 25i - 30 {i}^{2}  \\  = 5 - 19i + 30 \\  = 35 - 19i

I hope I helped you^_^

7 0
3 years ago
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(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

4 0
3 years ago
43.5 centimeters by 934 millimeters. Hello many centimeters are wood framing will she need
IRINA_888 [86]
273.8cm of wood framing

934mm=93.4cm

2(43.5+93.4)=y
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273.8=y
4 0
4 years ago
Repost* Can someone plz help? :(
masha68 [24]

Answer:

2.5

Step-by-step explanation:

4*2.5= 10

8* 2.5=20

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9+a=23 need to solve this problem​
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Answer:

a = 14

Step-by-step explanation:

Given

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a = 14

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4 years ago
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