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vova2212 [387]
3 years ago
11

30 + -30= 0

Mathematics
2 answers:
NikAS [45]3 years ago
5 0

-589+589

-589+500+89

-589+500+90+(-1)

Naily [24]3 years ago
3 0

Answer:

Here are some possibilities:

a.) 9 + -9 = 0

b.) 8 + 2 + -10 = 0

c.) 6 + 4 + -2 + -8 =0

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Which expressions below equal a rational number? Choose all that apply. 4/5 + 3/8; sqrt(100) + sqrt(5); 7sqrt(5) - sqrt(245); (4
masha68 [24]

Answer:

Step-by-step explanation:

<h3>Rational number</h3>

1)  \dfrac{4}{5}+\dfrac{3}{8}\\\\\dfrac{4}{5} \ \text{is a rational number} \ and \ \dfrac{3}{8} \ \text{is a rational number}\\\\\dfrac{4}{5}+\dfrac{3}{8} \ \text{is also a rational number}

b) \sqrt{100}+\sqrt{5} = 10+\sqrt{5}\\\\\sqrt{5} \ \text{is a irrational number}. \\\\ \text{Rational number added to irrational number will result in an irrational number}\\\\10 + \sqrt{5} \ is \ not \ a \ rational \ number.

c)

7\sqrt{5}-\sqrt{245}=7\sqrt{5}-\sqrt{7*7*5}

                   = 7\sqrt{5}-7\sqrt{5}\\\\=0\\\\\text{\bf $ 7\sqrt{5}-\sqrt{245}$ ia a rational number}

d)

(4\sqrt{7})*(2\sqrt{7})=4*2*\sqrt{7*7}\\

                       = 4*2*7

                       = 56

4\sqrt{7}*2\sqrt{7} \ \text{\bf is a rational number}

8 0
2 years ago
What is a verbal expression for b-9
cricket20 [7]

Answer:

Nine less than a number

Step-by-step explanation:

7 0
3 years ago
josh works for moo moo milkshakes. the company wants to know what milkshake flavor is the most popular. Today he surveyed every
Taya2010 [7]
The type of sampling demonstrated above is systematic sampling.

S<span>ystematic sampling is a type of probability sampling method in which sample members from a larger population are selected according to a random starting point and a fixed periodic interval. This interval, called the sampling interval, is calculated by dividing the population size by the desired sample size.</span>
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3 tons of bark cost $15,540.00. What is the price per pound ?
hoa [83]

Answer:

$2.59 per pound of bark.

Step-by-step explanation:

Convert 3 tons to pound

1 ton = 2,000 pounds.

3 x 2,000 = 6,000

Now divide the $ and the pounds to find the $ per pound rate

6,000 ÷ 15,540 = 2.59

$2.59

7 0
4 years ago
Krishawn adds two rational expressions, and then simplifies the answer. His simplified answer is (x-6)-(8+2)/x-2 Which expressio
arlik [135]
The answer is C.

You're welcome ;)
5 0
3 years ago
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