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3 years ago

Pls help asap giving brainlist if it lets me

Mathematics

2 answers:

Bingel [31]3 years ago

7 0

Answer:

d and f

Step-by-step explanation:

a, b, c and e are positive

ra1l [238]3 years ago

4 0

Answer:

F and D

Step-by-step explanation:

When a negative number is multiplied by a positive number, the result is a negative number. When a negative number is multiplied by another negative number, the result is positive.

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Where do I place the coordinates for -2x-5 and -x-4

Maslowich

Step-by-step explanation:

you need to calculate coordinates first. just by having the function definitions you don't have any coordinates yet.

I typically pick x = 0 as a first point.

so, that gives

-2×0 - 5 = -5

as y result for the first line.

the point on line 1 is then (0, -5)

and we get -0 - 4 = -4 as y result for the second line.

the point for the second line is (0, -4)

for second points I typically go for x = 1.

for the first line we get

-2×1 - 5 = -2 - 5 = -7

and the second point is (1, -7) for the first line.

for the second line we get

-1 - 4 = -5

and the second point is (1, -5) for the second line.

so, make points on the chart for all 4 points, and connect them (and extend the connecting lines to the left and right to the end of the grid).

and the crossing point ?

that is where both equations deliver the same result.

so,

-2x - 5 = -x - 4

-x = 1

x = -1

and the y is then e.g. -2×-1 - 5 = 2 - 5 = -3

and the crossing point is (-1, -3)

6 0

2 years ago

Which of the following is false for the hyperbola (x+5)^2/4^2 - (y-2)^2/3^2=1

disa [49]

Answer:

C)One of the vertices is (-10,2)

Step-by-step explanation:

Given the hyperbola: $\dfrac{(x+5)^2}{4^2} -\dfrac{ (y-2)^2}{3^2} =1$

The standard equation for a hyperbola with a horizontal transverse axis is:

$\dfrac{(x-h)^2}{a^2} -\dfrac{ (y-k)^2}{b^2} =1$ where the center is at (h, k).

For our given hyperbola, the center (h,k)=(-5,2)

Now:

$c^2=a^2+b^2\\c^2=4^2+3^2\\c^2=25\\c=5$

Since the center is at (-5,2), its foci (-c,0) and (c,0) are:

(-5-5,2) and (-5+5,2)= (-10,2) and (0,2)

Similarly, since the center is at (-5,2), its vertices, (-a,0) and (a,0) are:

(-5-4,2) and (-5+4,2)= (−9,2), (−1,2).

Therefore, the odd option is C.

3 0

3 years ago

Simplify the expression shown. (3m4n)2

laiz [17]

Answer:

9m⁸n²

Step-by-step explanation:

(3m⁴n)² Remove parentheses

= 3²m⁸n² Square the 3

= 9m⁸n²

6 0

4 years ago

4x+6=10. what is the value of x?<br>

Minchanka [31]

Answer:

Step-by-step explanation:

4x+6=10

4x=4

x=1

8 0

3 years ago

Read 2 more answers

CHECK MY ANSWERS FOR ME?

marta [7]

Seems all good to me at least!

4 0

4 years ago