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Bogdan [553]
2 years ago
14

7+ -(8) - 1= what is the answer

Mathematics
2 answers:
nikdorinn [45]2 years ago
6 0

Answer:

-2

Step-by-step explanation:

7+(-8)-1

change to: 7-8-1

combine like terms (-8 and -1)

7-9

= -2

kirill [66]2 years ago
4 0

Answer: -2

Step-by-step explanation:

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Which expression is equivalent to x^8-256
Evgesh-ka [11]

Answer:

\large\boxed{x^8-256=(x^4+16)(x^2+4)(x+2)(x-2)}

Step-by-step explanation:

x^8-256\qquad\text{use}\ (a^n)^m=a^{nm}\\\\=x^{(4)(2)}-16^2=(x^4)^2-16^2\qquad\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=(x^4+16)(x^4-16)=(x^4+16)(x^{(2)(2)}-4^2)\\\\=(x^4+16)\bigg((x^2)^2-4^2\bigg)=(x^4+16)(x^2+4)(x^2-4)\\\\=(x^4+16)(x^2+4)(x^2-2^2)\\\\=(x^4+16)(x^2+4)(x+2)(x-2)

3 0
3 years ago
A rectangle has a perimeter of 60 inches. The length of the rectangle is 3 inches less than twice the width
liraira [26]

Answer:

width  = 11, len = 19

Step-by-step explanation:

length = 2w - 3

l = length

w = width

2(length) + 2(width) = perimeter

2(2w - 3) + 2(w) = 60

6w -6 =60

w = 11

len = 2(11) - 3

6 0
3 years ago
Read 2 more answers
The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of
valina [46]

Answer:

(221.39, 300.61) and (255.2223, 266.7777)

Step-by-step explanation:

Given that X, the  lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 17 days

Middle 98% would lie on either side of the mean with probability ±2.33 in the std normal distribution on either side of 0

Corresponding we have x scores as

Between 261-2.33*17 and 261+2.33*17

i.e. in the interval = (221.39, 300.61)

If sample size = 47, then std error of sample would be

\frac{17}{\sqrt{47} }

So 98% of pregnancies would lie between

261-2.33*\frac{17}{\sqrt{47} } and 262+2.33*\frac{17}{\sqrt{47} }

= (255.2223, 266.7777)

8 0
2 years ago
WILL GIVE BRAINLIEST IF UR RIGHT!! PLEASE HELP!!
Darina [25.2K]
D. 24 
you can simplify it down to y^3/x^2 then you just plug in x and y.
4 0
3 years ago
A woman passed gas silently. I said "it stinks", and she said "I apologize. Excuse me". Why did she say both of those things?
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