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sweet-ann [11.9K]
2 years ago
11

Perform the following calculations: (-16) - (-42)

Mathematics
2 answers:
leva [86]2 years ago
6 0

Answer:

26

Step-by-step explanation:

When we subtract a negative it is like adding

(-16) - (-42)

(-16) + (42)

Re arranging the order

42 -16

26

masha68 [24]2 years ago
3 0

Answer:

Step-by-step explanation:

The - 42 is going to give trouble.

Two minus signs multiplied together give a plus. In fact any number of even minus signs (2,4,6,8, 1000) multiplied together make a plus.

(-16) + 42 = 26

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Simplify the following expression, show all work you did to get the results​
777dan777 [17]

Answer:

(sqrt(7))/3 or decimal 0.8819171036881968635005385845464201419034197276941500601227781530...

Step-by-step explanation:

Simplify the following:

(sqrt(14))/(sqrt(18))

Hint: | Simplify radicals.

sqrt(18) = sqrt(2×3^2) = 3 sqrt(2):

(sqrt(14))/(3 sqrt(2))

Hint: | Multiply numerator and denominator of (sqrt(14))/(3 sqrt(2)) by sqrt(2).

Rationalize the denominator. (sqrt(14))/(3 sqrt(2)) = (sqrt(14))/(3 sqrt(2))×(sqrt(2))/(sqrt(2)) = (sqrt(14) sqrt(2))/(3×2):

(sqrt(14) sqrt(2))/(3×2)

Hint: | Multiply 3 and 2 together.

3×2 = 6:

(sqrt(14) sqrt(2))/6

Hint: | For a>=0, sqrt(a) sqrt(b) = sqrt(a b). Apply this to sqrt(14) sqrt(2).

sqrt(14) sqrt(2) = sqrt(14×2):

(sqrt(14×2))/6

Hint: | Multiply 14 and 2 together.

14×2 = 28:

(sqrt(28))/6

Hint: | Simplify radicals.

sqrt(28) = sqrt(2^2×7) = 2 sqrt(7):

(2 sqrt(7))/6

Hint: | In (2 sqrt(7))/6, divide 6 in the denominator by 2 in the numerator.

2/6 = 2/(2×3) = 1/3:

Answer:  (sqrt(7))/3

5 0
2 years ago
I need help!!!!!!!!!​
lutik1710 [3]

Answer:

a) 39 b) 17

Step-by-step explanation:

12x - 9

12(4) - 9

48 - 9

39

d/15 + 13

(60)/15 + 13

4 + 13

17

3 0
2 years ago
Read 2 more answers
The square of a number is 12 less than 7 times the number
Maru [420]
Im pretty sure its -9.
6 0
3 years ago
Read 2 more answers
Write a system of equations in x and y describing the situation. Do not solve the system. Keiko has a total of $ 5600 comma$5600
IgorLugansk [536]

Answer:

The correct answers are x + y = 5600 and x - y = 700.

Step-by-step explanation:

Write a system of equations in x and y describing the situation. Do not solve the system.

Keiko has a total of $ 5600, which she has invested in two accounts.

Let x be the amount of money in the larger account and y be the amount of money in the smaller​ account.

So, Keiko has invested her $5600 in two accounts x and y.

Thus x + y = 5600.

Also, given by the problem, the larger account (x) is $ 700 greater than the smaller account (y).​

Thus x - y = 700.

Thus the two system of equation in x and y describing the given situation are

x + y = 5600 and x - y = 700

8 0
3 years ago
What is the equation of the line in point slope form
Phoenix [80]
Well... to solve use rise over run... that is to find the slope,
now to find the y-intercept you look at what coordinate crosses the y-axis. 
y= (what you got for the slope Ex. 1/2)x + (the y-intercept)

Figure it out and you got the answer with just a bit of help!!!

Hope this helps!
5 0
3 years ago
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