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3 years ago

Plllz helpWhich math expression can be used to represent this phrase? 5 less than triple a number x

Mathematics

2 answers:

GuDViN [60]3 years ago

4 0

I'm pretty sure the expression would be 3x-5. It might also be -5+3x which would still give you the same answer.

Hope this helps!!!!

Marysya12 [62]3 years ago

3 0

Answer: Where is the math expressions? I can't figure out the question if I don't have to choices.

Step-by-step explanation:

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Find the distance between the pair of points. give an exact answer, and, where appropiate, and apporximation to two decimal plac

atroni [7]

Distance Formula: $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
Product rule of radicals: √ab = √a x √b

Using our two points, we can solve for the distance as such:

$\sqrt{(4-(-6))^2+(3-(-1))^2}\\ \sqrt{(10)^2+(4)^2}\\ \sqrt{100+16}\\ \sqrt{116}$

Now our exact answer may be √116, however using the product rule of radicals we can further simplify the radical as such:

√116 = √4 x √29 = 2√29.

Exact Answer: <u>√116 or 2√29</u>
Approximate Answer: <u>10.77</u>

8 0

3 years ago

I need help plzz someone help meee :)

Eddi Din [679]

Answer:

Table 1 = Proportional

y is 7 times x

Table 2 = Not proportional

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

PLEASE HELP!!!!! A satellite telescope has a parabolic dish. Satellite signals are collected at the focal point (focus) of the

-BARSIC- [3]

The dish illustrates operations on a parabola.

The depth of the parabolish dish is 160 feet.

The bowl is said to be a parabola.

So, we have:

$\mathbf{(x -h)^2 = 4p(y - k)}$

Where:

$\mathbf{Focus: p = 40}$

$\mathbf{Vertex:(h,k) = (0,0)}$

From the question, the diameter is 160 feet.

So, the radius (r) is:

$\mathbf{r = \frac{160}{2} = 80}$

So, the coordinate of the depth of the parabola would be:

$\mathbf{(x,y) = (60 + 100,y)}$

$\mathbf{(x,y) = (160,y)}$

Substitute these values in $\mathbf{(x -h)^2 = 4p(y - k)}$

So, we have:

$\mathbf{(160 - 0)^2 = 4 \times 40 \times (y -0)}$

$\mathbf{160^2 = 160y}$

Divide both sides by 160

$\mathbf{160 = y}$

Rewrite as:

$\mathbf{y = 160 }$

Hence, the depth of the parabolish dish is 160 feet.