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3 years ago

Describe the number 78 in two different ways

Mathematics

1 answer:

OLga [1]3 years ago

6 0

70+8,39*2; they all equal seventy two. Also, 0.78*100 works.

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X+2(x+3(x+4(x+5)))=153

Allushta [10]

Answer:

$x=1$

Step-by-step explanation:

Here first open the inner parentheses and use the distributive property,

$4(x+5)=4x+20\\\\(x+4(x+5))=(x+4x+20)=(5x+20)\\\\3(x+4(x+5))=3(5x+20)=15x+60\\\\(x+3(x+4(x+5)))=(x+15x+60)=16x+60\\\\2(x+3(x+4(x+5)))=2(16x+60)=32x+120\\\\x+2(x+3(x+4(x+5)))=x+32x+120=33x+120\\\\\\Hence\ x+2(x+3(x+4(x+5)))=x+32x+120=33x+120\\\\\Rightarrow 33x+120=153\\\\33x=153-120\\\\33x=33\\\\x=1$

3 0

3 years ago

A b and c are different questions

GuDViN [60]

Answer:

A.5

B.12

C.42

Step-by-step explanation:

A. 5th time meaning 72-(0.75*5)=68.25

B.72-63=9 9/0.75=12

C.40*0.75=30 72-30=42

3 0

3 years ago

Read 2 more answers

Y+12=7y solve for y mathmatics

Kryger [21]

Answer:

Step-by-step explanation:

y + 12 = 7y

<em>isolate variable</em>

12 = 6y

<em>divide both sides by 6</em>

2 = y

5 0

3 years ago

Read 2 more answers

Suppose a box contains a double-headed coin, a double-tailed coin, and a conventional coin. A coin is picked at random and flipp

notsponge [240]

Answer:

P(D|A)=0.666

Step-by-step explanation:

We will use the tree diagram to understand these probabilities that is attached to the bottom of this answer.

Since there are three coins in the box, the probability of taking one in particular (the double-headed one, which is event D) is one third, which is equal to 0.333

Since the coin showed heads, the probability of it being a double-tailed coin is zero.

The Bayes theorem says that P(D|A) is the multiplication of P(D) and P(A), divided the probability of A happening by any means, happening D or not, which is the sum of all probabilities of A happening:

$P(D|A)=\frac{P(D)*P(A_1)}{P(D)*P(A_1)+P(E)*P(A_2)} =\frac{0.333*1}{0.333*1+0.333*0.5}=0.666$

5 0

3 years ago

Write a ratio, in simplest form, that compares the two quantities (show your work):

Evgen [1.6K]

One km is about 0.621371 so then you do 400/0.621371 which is 643.738 then you have your answer.400m:643.738km

8 0

3 years ago