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polet [3.4K]
4 years ago
5

On a science test, 2 points are deducted from a total of 100 points for each question answered incorrectly. Trevor scored an 84

on the test. The equation 100 – 2x = 84, where x represents the number of questions answered incorrectly, represents the situation. How many questions did Trevor answer incorrectly?
Mathematics
1 answer:
Murrr4er [49]4 years ago
6 0
100-2x=84
-100      -100
-2x=-16
/-2    /-2
x=8
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QUICK WHATS THIS ANSWER?!?
Mars2501 [29]

Answer:

C. -x-6>-3.5

Step-by-step explanation:

One is asked to find which inequality has (x=-3) in its solution set. Remember that an inequality is another way to represent a set of solutions. In essence, it states that all numbers less than; less than or equal to; greater than; or greater than or equal to, are a part of the solution. One simplifies an inequality in a similar manner to how one simplifies an equation, by using inverse operations and simplification. Just note that when multiplying or dividing the inequality by a negative number, one has to flip the inequality sign to ensure the expression remains true.

Simplify each of the inequalities, then evaluate to see which one has (x=-3) as a part of its solution set.

A. -x -6

-x

x>-2.5

B. -x-6>3.5

-x>9.5

x

C. -x-6>-3.5

-x>2.5

x

D. x-6>-3.5

x>2.5

As can be seen, option (C -x-6>-3.5) is the only one that fits this requirement. Since option (C) simplifies down to (x) or in words, (x) is less than (-2.5). This option is the only one that fits the solution since (-3) is less than (-2.5).

7 0
3 years ago
SOLVE THIS PLEASE, ITS GOT SOMETHING TO DO WITH SOH, CAH, TOA
gtnhenbr [62]

Answer:

x ≈ 36.9°

Step-by-step explanation:

Using the sine ratio in the right triangle, that is

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7 0
3 years ago
Find the equation, (f(x) = a(x-h)2+ k), for a parabola containing point (-1,0) and having (-3, 4) as a vertex. What is the stand
kirill115 [55]
(h;\ k)\ -\ \text{the coordinates of the vertex}

\text{therefore we have:}\ f(x)=a(x+3)^2+4

\text{a parabola that passes through the point (-1; 0)}

\text{substitute the coordinates of the poin (-1; 0) to the equation}

(-1;\ 0)\to x=-1;\ y=0\\\\0=a(-1+3)^2+4\\\\0=a(2)^2+4\\\\0=4a+4\ \ \ |-4\\\\4a=-4\ \ \ |:4\\\\a=-1

f(x)=-(x+3)^2+4=-(x^2+2\cdot x\cdot3+3^2)+4=-(x^2+6x+9)+4\\\\=-x^2-6x-9+4=-x^2-6x-5

5 0
3 years ago
Help please!!!! I will really appreciate it please help
Scorpion4ik [409]

Answer:

Correct answer is x = 28°

Step-by-step explanation:

Okay we know Angle A is 2x + 2

Angle B is 90

Angle C is 180 - 148 = 32 ( straight line angle is 180)

Sum of all angles should be 180 in a triangle

which means

A + B + C = 180

2x + 2 + 32 +90 = 180

2x + 124 = 180

2x = 180-124

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x = 56/2

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Answer:

ur mom reminds me of my dad lol

Step-by-step explanation:

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3 years ago
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