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3 years ago

What is the answer to -5+2=

Mathematics

2 answers:

Pavlova-9 [17]3 years ago

5 0

Answer:

-3

Step-by-step explanation:

mezya [45]3 years ago

4 0

the correct answer is -3

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Please help me thank you.

Alexxandr [17]

Answer:

Step-by-step explanation:

3 -4 | 2

0 -1 | 7

3/2 -2 | 1

R1/3 ----> R1 (divide Row 1 by 3)

1 -4/3 | 2/3

0 -1 | 7

3/2 -2 | 1

R3 - 3/2 R1 -------> R3 (multiply Row 1 by 3/2 and subtract it from Row 3)

1 -4/3 | 2/3

0 -1 | 7

0 0 | 0

R2 / -1 -------> R2 (Divide Row 2 by -1)

1 -4/3 | 2/3

0 1 | -7

0 0 | 0

R1 + 4/3 R2 --------> R1 (Multiply Row 2 by 4/3 and add it to Row 1)

1 0 | -26/3

0 1 | -7

0 0 | 0

5 0

3 years ago

If z=sprt5 -sprt2, then Izl=

ASHA 777 [7]

Answer:

is the answer

because sprt - sprt = 0

then 5-2=3

3 0

3 years ago

Consider the following scenario: Let P(C) = 0.4. Let P(D) = 0.5. Let P(C|D) = 0.6. a. Find P(C AND D). b. Are C and D mutually e

Nataly_w [17]

a. By definition of conditional probability,

P(C | D) = P(C and D) / P(D) ==> P(C and D) = 0.3

b. C and D are mutually exclusive if P(C and D) = 0, but this is clearly not the case, so no.

c. C and D are independent if P(C and D) = P(C) P(D). But P(C) P(D) = 0.2 ≠ 0.3, so no.

d. Using the inclusion/exclusion principle, we have

P(C or D) = P(C) + P(D) - P(C and D) ==> P(C or D) = 0.6

e. Using the definition of conditional probability again, we have

P(D | C) = P(C and D) / P(C) ==> P(D | C) = 0.75

3 0

3 years ago

Which sequence can be generated from the formula f(x + 1) = (f(x))?

drek231 [11]

C ,fam im on the cite and everythanng,

7 0

3 years ago

Read 2 more answers

Working alone, Henry takes 3 hours less than Mary to clean the carpets in the entire office. Working together, they can clean th

Sati [7]

Answer:

It would take Henry 3 hours to clean the office carpets if Mary were not there to help

Step-by-step explanation:

Assume that it takes Henry t hours to clean the carpets

∵ Henry takes 3 hours less than Mary to clean the carpets

∵ Henry takes t hours

- That means add 3 to t to find Mary time

∴ Mary takes t + 3 hours

∵ The rate of Henry is $\frac{1}{t}$

∵ The rate of Mary is $\frac{1}{t+3}$

∵ Working together, they can clean the carpets in 2 hours

- Add the two rates and equate the answer by $\frac{1}{2}$ (their rate together)

∴ $\frac{1}{t}+\frac{1}{t+3}=\frac{1}{2}$

Multiply the two denominators and multiply each numerator by the other denominator to add the two fractions of the left hand side

∵ $\frac{(1)(t+3)}{t(t+3)}+\frac{(1)t}{t(t+3)}=\frac{1}{2}$

∴ $\frac{(t+3)}{t(t+3)}+\frac{t}{t(t+3)}=\frac{1}{2}$

- Add the two fractions in the left hand side

∴ $\frac{t+3+t}{t(t+3)}=\frac{1}{2}$

∴ $\frac{2t+3}{t^{2}+3t}=\frac{1}{2}$

Use the cross multiplication

∵ (t² + 3t)(1) = 2(2t + 3)

∴ t² + 3t = 4t + 6

- Subtract 4t from both sides

∴ t² - t = 6

- Subtract 6 from both sides

∴ t² - t - 6 = 0

- Factorize it into two factors

∴ (t - 3)(t + 2) = 0

Equate each factor by 0 to find t

∵ t - 3 = 0

- Add 3 to both sides

∴ t = 3

∵ t + 2 = 0

- Subtract 2 from both sides

∴ t = -2 ⇒ reject this answer because there is no - ve time

∴ t = 3

∴ Henry would take 3 hours to clean the carpets alone

It would take Henry 3 hours to clean the office carpets if Mary were not there to help

8 0

3 years ago