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3 years ago

What is x? 4(x+2)=4(x+2)

Mathematics

1 answer:

Butoxors [25]3 years ago

4 0

It's the identity equation so $x\in\mathbb{R}$

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I need help with this problem ASAP

omeli [17]

Answers: 7x^2y^2 -3x+6y

I am not sure how to explain it but here you go

7 0

3 years ago

What is the area of 1/2x6x6?

NISA [10]

18 units of whatever the measure is

8 0

3 years ago

Read 2 more answers

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}$ .

8 0

2 years ago

The variable z is inversely proportional to x. When x is 3, z has the value 2.

kirill [66]

Answer:

z = 6/13

Step-by-step explanation:

The new value of x is 13/3 times the old value. Since z is inversely proportional to x, it will be multiplied by the inverse of that, 3/13.

2 × 3/13 = 6/13 . . . . value of z when x=13

3 0

3 years ago

How do you do parts? Like what part of 28 is 17? How do you figure out how to find your answer? Someone please explain.

expeople1 [14]

Answer:

Divide

Step-by-step explanation:

If you mean as in, what percent of 28 is 17, you can just divide 17/28. It would be 61% or 61/100 as a fraction! (unless you mean something else :c )

3 0

2 years ago