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3 years ago

Please help giving brainliest

Mathematics

2 answers:

ivanzaharov [21]3 years ago

7 0

Answer:

H 28.26 mm

Step-by-step explanation:

jekas [21]3 years ago

6 0

28.26 cause it is trust me

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Subtract. (4x^2 + 8x - 2) - (2x^2 - 4x + 3) Enter your answer, in standard form.

vovikov84 [41]

Answer:

$\large\boxed{(4x^2 + 8x - 2) - (2x^2 - 4x + 3)=2x^2+12x-5}$

Step-by-step explanation:

$(4x^2 + 8x - 2) - (2x^2 - 4x + 3)\\\\=4x^2 + 8x - 2 -2x^2 -(- 4x)- 3\\\\=4x^2+8x-2-2x^2+4x-3\qquad\text{combine like terms}\\\\=(4x^2-2x^2)+(8x+4x)+(-2-3)\\\\=2x^2+12x-5$

5 0

3 years ago

What are my zeros (x^2 - 8x + 1)?

Pavel [41]

Answer:

x= 7.87298334621 x=.12701665379

Step-by-step explanation:

This is in standard form so we have to factor this into

x^2-8x + 16 + 1 = 16

(x-4)^2 = 15

(x-4) = $\sqrt{15\\}$

x-4= ± 3.87298334621

x-4 = 3.87298334621 x-4= -3.87298334621

x= 7.87298334621 x=.12701665379

7 0

3 years ago

MARKING BRAINLIEST!! For what value of x is the figure below a rectangle?

Vedmedyk [2.9K]

<h2>Answer: Yes it is a rectangle I don't know if that's all you want to know</h2>

5 0

3 years ago

If f(x)=1/9x-2, what is f–1(x)?

jekas [21]

we are given

$f(x)=\frac{1}{9x-2}$

For finding inverse function , we do following steps

step-1:

Set f(x)=y

$y=\frac{1}{9x-2}$

step-2:

Switch x and y

$x=\frac{1}{9y-2}$

step-3:

now, we can solve for y

$x=\frac{1}{9y-2}$

Multiply both sides by 9y-2

$x\times (9y-2)=(9y-2)\times \frac{1}{9y-2}$

$x(9y-2)=1$

$9xy-2x=1$

Add both sides by 2x

$9xy-2x+2x=2x+1$

$9xy=2x+1$

now, we can divide both sides by 9x

$y=\frac{2x+1}{9x}$

so, we get inverse function as

$f^{-1}(x)=\frac{2x+1}{9x}$ ................Answer

3 0

3 years ago

NEED ASAP NO ROCKY

BlackZzzverrR [31]

Answer: I got it to you fast no flash

The first given equation is:

j + k = 3

This can be rewritten as:

j = 3 - k .................> I

The second given equation is:

j - k = 7 ............> II

Substitute with I in II and solve as follows:

j - k = 7

(3-k) - k = 7

3 - 2k = 7

-2k = 7-3 = 4

k = 4/-2

k = -2

Substitute with k in I to get the value of J as follows:

j = 3 - k

j = 3 - (-2) = 3+2

j = 5

Based on the above, the solution is (5,-2)

4 0

3 years ago