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Vadim26 [7]
3 years ago
10

Will mark brainliest ONE question with picture included^^^^

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
3 0

Answer:

The third option is wrong becuase x isn't a defined variable, and they specified that the book must be at least 250 pages, which means that it can't be less.

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What is the solution to the equation?<br> √x+10 -9 =-7<br><br> I think it is -6 but I'm not sure
nadya68 [22]
Let's solve your equation step-by-step.<span><span><span><span>√x</span>+10</span>−9</span>=<span>−7


</span></span><span><span><span>√x</span>+1</span>=<span>−7

</span></span>Step 1: Add -1 to both sides.

<span><span><span><span>√x</span>+1</span>+<span>−1</span></span>=<span><span>−7</span>+<span>−1

</span></span></span><span><span>√x</span>=<span>−8

</span></span>Step 2: Solve Square Root.

<span><span>√x</span>=<span>−8

</span></span><span>x=<span><span>(<span>−8</span>)</span>2</span></span>(Square both sides)

<span>x=64

</span>Check answers. (Plug them in to make sure they work.)

<span>x=64</span>(Doesn't work in original equation)

Answer:

<span>No solutions.</span>
3 0
3 years ago
Read 2 more answers
Use numbers in part a
Zina [86]

Answer: 3.568 ⋅ 10x^{8\\}

Step-by-step explanation:

If you have to evaluate it then thats your answer if not hit me back ASAP

3 0
3 years ago
Two angles are supplementary. One angle can be represented by 2x, while the other by 3x-10. What is the value of 2x? Based on th
liubo4ka [24]
Supplementary angles = 180
2x +3x-10 = 180
5x -10 =180
5x -10 +10 =180+10
5x =190
5x/5 =190/5
x = 38
2x=76
3x-10= 3(38)-10=104

The measure of angles are 76 and 104
6 0
3 years ago
Damon plans to buy a snowboard that cost $160. Damon has $40. He will save $20 each week until he has enough to buy the snowboar
Gekata [30.6K]

Answer:  It will take Damon 6 weeks to save the money he needs to buy the snowboard

Step-by-step explanation:

First, let's see what the problem is giving us:

-The variable X will represent the number of weeks it will take Damon to save the money he needs.

- Damon has $40

- Damon is going to safe $20 weekly

- The snowboard costs $160

Therefor:

Our equation will be:  $40 + $20X = $160

Step 1

We need to isolate the variable by subtracting in both sides of the equation 40 in order to maintain the equality.

40 - 40 + 20X = 160 - 40

This will let us with 20X = 120

Step 2

We have to isolate the variable again, but this time (because the variable is being multiplied by 20) we have to divide on both sides of the equation.

20X/20 = 120/20

Therefore: X=6

<u />

4 0
3 years ago
Read 2 more answers
Can someone help me please? the last point of the first graph ends on 6 ​
just olya [345]

Answer:

a) Yes

b) for reference, draw the line y = x, and reflect it over that, this reflection will be your inverse. Or switch the x and y values of each point of the function.

Here is a photo of the original function in black, it's inverse in red, and the line of reflection y = x in blue:

c) No, because it fails the vertical line test, when you draw a vertical line across the inverse function, it hits it more than once.

d) Domain of the original function: -6 ≤ x ≤ 6 ; x(the domain) is greater than or equal to -6 and less than or equal to 6.

e) Domain of inverse function: 0 ≤ x ≤ 4 ; x(the domain) is greater than or equal to 0 and less than or equal to 4.

f) Range of the original function: 0 ≤ y ≤ 4 ; y(the range) is greater than or equal to 0 and less than or equal to 4.

e2) Range of the inverse function: -6 ≤ y ≤ 6 ; y(the range) is greater than or equal to -6 and less than or equal to 6.

f2) x-intercept of original function: -6

g) y-intercept of the inverse function: -6

h) x-intercept of the inverse function: 4

i) y-intercept of the original function: 4

j) (2,2) or any point where the x, and y are the same within the function, or the point where the function intersects y = x.

5 0
3 years ago
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