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3 years ago

Given that a= -1, b= 2 and c= -3, find the value of a+b+c

Mathematics

2 answers:

777dan777 [17]3 years ago

8 0

Answer: -2

Step-by-step explanation:

First, put the numbers into the equation.

-1 + 2 + (-3)

Then, simply start solving.

-1 + 2 = 1

1 + -3 = -2

Angelina_Jolie [31]3 years ago

6 0

Answer:

-2

Step-by-step explanation:

-1+2-3

-2

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Y varies directly as x. Y=42 when x=6. Find the value of y when x =15.

pentagon [3]

Answer:

y=120

Step-by-step explanation:

Y varies directly as x is written as

$y \alpha x$

introducing a constant

y=kx

from the question, when y=48, x=6

substitute it in the formula

48=6k

making k the subject by dividing through by 6

$\frac{48}{6} = \frac{6k}{6}$

k=48/6

k=8

put the value of k in the expression y=kx

y=8x

from the question,the value of y when x=15 is given by

y=8×15

y=120.

4 0

3 years ago

Please answer the question to the best of your ability :)

kherson [118]

Answer:

Step-by-step explanation:

-3+12 = 9

-12+3 = -9

-6+6 = 0

6+6 = 12

5 0

3 years ago

Read 2 more answers

How do u find the slope of (6,-10), (-15,15)

Sergeu [11.5K]

$m = \frac{y_{2} - y_{1}}{x_{2}- x_{1}} = \frac{15 - (-10)}{-15 - 6} = \frac{15 + 10}{-21} = \frac{25}{-21} = -1\frac{4}{21}$

   y - y₁ = m(x - x₁)
y - (-10) = -1⁴/₂₁(x - 6)
   y + 10 = -1⁴/₂₁(x) + 1⁴/₂₁(6)
   y + 10 = -1⁴/₂₁x + 7¹/₇
   - 10 - 10
   y = -1⁴/₂₁x - 3¹/₇

7 0

3 years ago

How was this answered? i don't know how, pls. help

ratelena [41]

Answer:

see explanation

Step-by-step explanation:

Using $\sqrt{-1}$ = i, then i² = ( $\sqrt{-1}$ )² = - 1