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ryzh [129]
3 years ago
8

Why is 3 + (-5) equal to -2

Mathematics
2 answers:
Ilia_Sergeevich [38]3 years ago
6 0
When you add a positive and a negative like you did here it basically is the same as subtracting 5 from 3
omeli [17]3 years ago
5 0
Because 5-3=2, so 5 is negative the 2 has to be negative because 5 is bigger than 3. Hope this helps!

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PLZ HELP ASAP SIMILARITY
RSB [31]
CD/DB=AC/AB
DB=3.8; AC=4.6; AB=6.8
CD/3.8=4.6/6.8
Solving for CD:
CD=3.8*4.6/6.8
CD=2.570588235
Rounded to one decimal place:
CD=2.6

Answer: The length of CD is 2.6
6 0
3 years ago
F(x)=4x^3+3x-2 and g(x)=2x+2 what is the value of f(x)=g(x)?
Arlecino [84]

Answer:

x ≈ 0.916875

Step-by-step explanation:

→ Equate the expressions to each other

4x³ + 3x - 2 = 2x + 2

→ Get all the terms to one side

4x³ + x - 4

→ Solve for x

x ≈  0.916875

8 0
2 years ago
Rhian sat a maths test and an English test. in the maths test, she scored 14/17. in the English test, she scored 31/39. in which
Norma-Jean [14]

Answer:

She did better on the Math test.

Step-by-step explanation:

14/17 is 82 percent, and 31/19 is only about 80%.

5 0
2 years ago
The results of a national survey showed that on average, adults sleep 7.4 hours per night. Suppose that the standard deviation i
Lilit [14]

Answer: 95%

Step-by-step explanation:

Given : The results of a national survey showed that on average, adults sleep \mu=7.4 hours per night.

Standard deviation: s=1.8 hours

a) To find : the percentage of individuals who sleep between 3.8 and 11 hours per day.

Note that 3.8=7.4-2(1.8)

i.e. 3.8 is 2 standard deviations less than the mean value.

11=7.4+2(1.8)

i.e. 11 is 2 standard deviations more than the mean value.

According to the empirical rule , about 95% of the population falls within 2 standard deviation from the mean.

⇒ About 95% of individuals who sleep falls within 2 standard deviation from the mean i.e. between 3.8 and 11 hours per day .

Hence, the approximate percentage of individuals who sleep between 3.8 and 11 hours per day = 95%

4 0
3 years ago
Write an algebraic expression for the verbal expression.<br> x more than 7<br> Help meeeee
Vadim26 [7]

Answer:

x + 7

Step-by-step explanation:

<u>Step 1: Translate</u>

<em>x</em> = <em>x</em>

more than = addition (+)

7 = 7

<u>Step 2: Combine</u>

x + 7

8 0
3 years ago
Read 2 more answers
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