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andriy [413]
3 years ago
7

PLZ HELP ME PLZ I don't understand this

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
5 0

Answer:

97

Step-by-step explanation:

For this equation we have to plug in, so z= 6 and w=7. the question is 8z+7w

so plug in 6 for z and 7 for w. 8(6)+7(7) so 8*6 is 48 and 7*7= 49. 48+49= 97

hope this helps :)

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HELP !! ASAP !!
Sedaia [141]

Answer:

The roots are;

x = (2 + i)/5 or (2-i)/5

where the term i is the complex number representing the square root of -1

Step-by-step explanation:

Here, we want to use the completing the square method to solve the quadratic equation;

f(x) = -5x^2 + 4x -1

Set the function to zero

0 = -5x^2 + 4x - 1

So;

-5x^2 + 4x = 1

divide through by the coefficient of x which is -5

x^2 - 4/5x = -1/5

We now take half of the coefficient of x and square it

= -2/5^2 = 4/25

add it to both sides

x^2 - 4x/5 + 4/25= -1/5 + 4/25

(x- 2/5)^2 = -1/5 + 4/25

(x - 2/5)^2 = -1/25

Take the square root of both sides

x - 2/5 = √( -1/25

x - 2/5 = +i/5 or -i/5

x = 2/5 + i/5 or 2/5 - i/5

7 0
3 years ago
What does the number line above represent?
sattari [20]
It is the last one. A closed circle means less than or equal to, so that crosses out the top two. The third says five is greater and we know that is not true because the line is decreasing in value. It must be the fourth.
8 0
3 years ago
The diameter of a cylinder is 8cm and the height is 2. What is the Volume? (NOTE: V=r2h)
Afina-wow [57]

Step-by-step explanation:

diameter= 8

radius=diameter/2

=8/2

=4

height=2

Volume =r2h

=4*2*2

=16

therefore the volume of the cylinder is 16 cm^3

hope it helps u

pls mark it as the brainliest

3 0
3 years ago
Solve the expression 3x+15-2x+12
muminat
3x + 15 - 2x + 12

(3x - 2x) + (15 + 12)

x + 26

hope this helped :)
8 0
3 years ago
PLZ HURRY IT'S URGENT!!
Alexus [3.1K]
The answer is 6/7 or 5/6 idk but pic would help
5 0
3 years ago
Read 2 more answers
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