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3 years ago

Write the value of n that makes statement true (3+n)+7=3+(6+7)

Mathematics

1 answer:

8_murik_8 [283]3 years ago

5 0

Answer: n = 6

Step-by-step explanation:

First lets combine like terms

(3 + n) + 7 = 3 + (6 + 7)

10 + n = 16

Now let’s subtract 10 on each side to isolate x

N = 6

Now let’s check our work by inputting x just to make sure

(3 + 6) + 7 = 3 + (6 + 7)

9 + 7 = 3 + 13

16 = 16

So we are right!

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For what values of x is the expression below defined?

aleksklad [387]

Answer:

C: x > 0

Step-by-step explanation:

Division by zero is undefined. That 5x in the denominator must be > 0 for the whole expression to be defined. Thus, C: x > 0 is the correct answer here.

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4 years ago

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If the hypotenuse of a right triangle is 2 sqrt 3 units long and one legs is sqrt 3 units long, how long is the other leg?

allochka39001 [22]

Theorem of Pythagoras: a²+b²=c², where a, b is legs and c is hypotenuse.

We've got one leg known, let it be a=sqrt 3,
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Putting these into the theorem, we get an equation: (sqrt3)²+b²=(2sqrt3)² . Solving it, we get:

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4 years ago

How to make this a box plot 16,16,16,20,21,21,23,25,26,26,28,28

GREYUIT [131]

Answer:

16x3 (repeats 3 times) 20x1 21x2 23x1 25x1 26x2 28x2

Step-by-step explanation:

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4 years ago

A flock of 200 birds were flying south for the winter. Every day, the amount of birds in the flock increased by an average of 4%

astra-53 [7]

Answer:

$b=200(1.04)^{d}$

Step-by-step explanation:

we know that

The exponential function is of the form

$y=a(b)^{x}$

where

a is the initial value

b is the base

In this problem we have

a=200 birds

b=100%+4%=104%=104/100=1.04

substitute

$y=200(1.04)^{x}$

Let change of variables

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4 years ago

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day.

kkurt [141]

Answer:

Let's say that the whole book have 5a pages.

First day: a + 12

Second day: (4a)1/4+15= a + 15

Third day: (1/3)[ 4a - (a+15)] +18= a + 13

Forth day: 70

So we get this:

(a + 12) + (a + 15) + (a + 13) + 70 = 5a

a + 12 + a + 15 + a + 13 + 70 = 5a

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3a - 5a = -110

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275 pages

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