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timofeeve [1]
3 years ago
9

PLZ HELP ME PLZ PLZ! Find the product.

Mathematics
2 answers:
cluponka [151]3 years ago
6 0
The answer is -84 because the negative times a positive equals a negative
Pepsi [2]3 years ago
3 0
= 7(-12) \\  \\ (7)(-12) \\  \\ Answer = - 84
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Find the domain of the following expression 15 - √(x+2)
ipn [44]

Answer:

[-2, ∞]

Step-by-step explanation:

15 - √(x+2)

domain is any value as long as (x+2) is not-negative, since √ of a negative number has no Real solution.

x+2 ≥ 0 ⇒ x ≥ -2

6 0
2 years ago
How do you solve 28-2.2x=11.6x-54.8??
malfutka [58]
28 - 2.2x = 11.6x - 54.8
28 + 54.8 = 11.6x + 2.2x
82.8 = 13.8x
82.8 / 13.8 = x
6 = x
or x = 6 
6 0
3 years ago
What is an equation of the line that is perpendicular to −x+2y=4 and passes through the point (−2, 1) ?
Elza [17]

Answer:

y=-2x-3

Step-by-step explanation:

Since our equation is in standard form Ax+By=C we must first manipulate the equation so that we have it in the slope-intercept form such that y=mx+b.  Therefore:

-x+2y=4\\2y=x+4\\\\y=\frac{x+4}{2}\\\\y=\frac{1}{2}x+2

Therefore, our slope is 1/2 and our y-intercept is 2.  Now in order to determine a perpendicular line to the one stated above we must then get the negative inverse of our slope meaning \frac{1}{2}=-2 (negative reciprocal).  Now we must use the point slope formula:

y=m(x-x_1)+y_1

Where m is the slope, x1 is -2 and y1 is 1 (because of the ordered pair given). And so:

y=-2(x-(-2))+1\\\\y=-2(x+2)+1\\\\y=-2x-4+1\\\\y=-2x-3

Therefore, the line that is perpendicular to -x+2y=4 is y=-2x-3.


6 0
3 years ago
Helpppppppppppppppppppp plsssss​
diamong [38]

Answer:

b

Step-by-step explanation:

5 0
3 years ago
PLZZ HELP! WILL MARK BRAINLIEST!!
joja [24]

Answer:

Step-by-step explanation:

Neptune is about 2,700,000,000 miles from Earth.

Mercury is about 135,000,000 miles from Earth.

A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. The power is the number of decimal places you move.

1) 2,700,000,000 = 2.7 x 10^{9}

      135,000,000  = 1.35 x 10^{8}

2)

        \frac{Neptune}{Mercury} = \frac{2.7*10^{9} }{1.35*10^{8}}

You can see there is only one extra 0 on top, the rest will cancel so you have:

\frac{27}{1.35}  = 20

It's 20x farther to Neptune from Earth, than it is to Mercury from Earth.

7 0
3 years ago
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