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2 years ago

1/3(x-7)=5 what does x equal

Mathematics

1 answer:

Tpy6a [65]2 years ago

8 0

Answer: 1/3x(22-7)=5 so the answer is 22.

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Find the equation using the point-slope formula:<br> (4, 3) m = -3

natita [175]

Answer:

y = 2/3x - 3

Step-by-step explanation:

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3 years ago

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Question 15 (5 points)<br> Find the angle between u = <7, -2> and v= (-1,2>.

Tema [17]

Answer:

Approximately $2.3127$ radians, which is approximately $132.51^{\circ}$ .

Step-by-step explanation:

Dot product between the two vectors:

$\begin{aligned}& u\cdot v \\ =\; & 7 \times (-1) + (-2) \times 2 \\ =\; & (-11) \end{aligned}$ .

Magnitude of the two vectors:

$\begin{aligned} \| u \| &= \sqrt{{7}^{2} + {(-2)}^{2}} \\ &= \sqrt{53} \end{aligned}$ .

$\begin{aligned} \| v \| &= \sqrt{{(-1)}^{2} + {2}^{2}} \\ &= \sqrt{5} \end{aligned}$ .

Let $\theta$ denote the angle between these two vectors. By the property of dot products:

$\begin{aligned} \cos(\theta) &= \frac{u \cdot v}{\|u\| \, \| v \|} \\ &= \frac{(-11)}{(\sqrt{53})\, (\sqrt{5})} \\ &= \frac{(-11)}{\sqrt{265}}\end{aligned}$ .

Apply the inverse cosine function ${\rm arccos}$ to find the value of this angle:

$\begin{aligned} \theta &= \arccos\left(\frac{u \cdot v}{\| u \| \, \| v \|}\right) \\ &= \arccos\left(\frac{(-11)}{\sqrt{265}}\right) \\ & \approx \text{$2.3127$ radians} \\ &= 2.3127 \times \frac{180^{\circ}}{\pi} \\ &\approx 132.51^{\circ}\end{aligned}$ .

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2 years ago

3) Solve the following problem using a proportion and write your solution in a complete sentence.

Solnce55 [7]

3/12= 0.25
0.25times25=$6.25

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3 years ago

X/6 = -4/5<br> Solve for X

ki77a [65]

Answer:

X/6 = -4/5

x=-4×6/5=-24/5

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3 years ago

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8 to the second power plus (1/5) to the second times 25 minus 1?

Ahat [919]

I got 64 for this. use this link https://www.mathpapa.com/algebra-calculator.html if you rteacher lets you use a calculator, it is really quick and walks you through the work. it also does algebra equations. best calculator.

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3 years ago