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iVinArrow [24]
2 years ago
7

please can someone explain to me how this is done the answer is 85 but how to figure it out I am giving away 10 points the quest

ion is one the image and the answer is 85 but just explain how it is done

Mathematics
1 answer:
shtirl [24]2 years ago
3 0

Answer:

Step-by-step explanation:

A = \frac{hb}{2}

h = 10 cm , b = 17 cm

A = 10 × 17 ÷ 2 = 85 cm²

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The roots of an equation are x=-1 plus or minus I the equation is x^2+ ?
Oxana [17]

Answer:

x^2+2x+2

Step-by-step explanation:

If the roots of the equation are -1\pm i, then by the zero product rule:

x=-1\pm i \\\\x+1\pm i=0 \\\\(x+1+i)(x+1-i)=0\\\\x^2+x-ix+x+1-i+ix+i+1=0 \\\\x^2+2x+2=0

You can confirm this with the quadratic equation:

x=\dfrac{-2\pm\sqrt{4-8}}{2}=\dfrac{-2\pm 4i}{2}=-1\pm i

Hope this helps!

8 0
2 years ago
Which function has the same y-intercept as the function?<br>​
rosijanka [135]

Answer:

6x -7y = 21

Step-by-step explanation:

The y-intercept of a line is the y value when x = 0. In the equation y = \frac23 x -3 \\, we can solve for its equation when we plug in x = 0.

Solving for y when x = 0:

y = \frac23 x -3 \\ y = \frac23 (0) -3 \\ y = -3.

So the y-intercept of the equation y = \frac23 x -3 \\ is -3.

To find what equation has the same y-intercept, we can do the same process for each equations given by the choices. However, I can see that the equation, 6x -7y = 21, has the y-intercept. If in doubt, you can check for the solution below or solve each equations for yourself.

Solving for y when x = 0:

6x -7y = 21 \\ 6(0) -7y = 21 \\ 0 -7y = 21 \\ -7y = 21 \\ \frac{-7y}{-7} = \frac{21}{-7} \\ y = -3

8 0
2 years ago
To divide 1.95 + 0.005, you will need to move the decimal in the divisor and the
juin [17]
I don’t really know what this means
5 0
3 years ago
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Nastasia [14]

Answer:

30 is the wrong one because it is not a factor of 100

30 60 90 120

20 40 60 80 100

Step-by-step explanation:

7 0
2 years ago
PLEASE HELP ASAP BY 11/12 BY 9:00 am!!!! WILL AWARD BRAINLIEST!!!
Eduardwww [97]

Answer:

x=1/4 y=1/4

Step-by-step explanation:

They mean x-coordinate and y-coordinate

8 0
3 years ago
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