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N76 [4]
1 year ago
15

Evaluate. 3^−1⋅(4⋅6)⋅2^−3 plz be sure to explain

Mathematics
1 answer:
TiliK225 [7]1 year ago
7 0
Remember PEMDAS 
Parenthesis, exponents, multiplication/division, add/subtract
So look for parenthesis first so we have (4*6)=24

3^-1*24*2^-3
Now look for exponents
3^-1= 1/3 because 3^1 = 1/3
and
2^-3=1/( 2*2*2) = 1/8

= (1/3)*24*(1/8 )

now multiply from left to right.

(1/3)*24= 8
8*(1/8)= 1 

final answer being 1 
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dexar [7]
Divide 54 inches by 9 inches which would be 6 inches therefore she would have to make her collage 6 inches wide to fit all of her photographs.
(to check this, all you have to do is multiply 9 by 6, then you get 54, which proves that this is correct.)
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1 year ago
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Convert 9500 seconds to hours
MariettaO [177]

Answer:

Aprox 2.6 hours

Step-by-step explanation:

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HELP ME!!! y is inversely proportional to square of x. Given that y=3 when x=7, find the value of x when y=18.375 TYSM!
Verdich [7]

Answer:

The value of x is -2√2 or 2√2.

Step-by-step explanation:

Given that y is inversely proportion to x², y ∝ 1/x². So the formula will be y = k/x² where k is the constant. In order, to find the value of k, you have to substitute the values of x and y into the formula :

y =  \frac{k}{ {x}^{2} }

let \: x = 7 \\ let \: y = 3

3 =  \frac{k}{ {7}^{2} }

3 =  \frac{k}{49}

3 \times 49 = k

k = 147

y =  \frac{147}{ {x}^{2} }

Next, you have to substitute the y value into the equation to find x :

let \: y = 18.375

18.375 =  \frac{147}{ {x}^{2} }

18.375 {x}^{2}  = 147

{x}^{2}  =  \frac{147}{18.375}

{x}^{2}  = 8

x = ± \sqrt{8}

x = - 2 \sqrt{2}  \:  \: or \:  \: 2 \sqrt{2}

7 0
11 months ago
A cafe offers senior citizens a 15% discount off its regular price of 8.95 for the dinner buffet. How much of a discounts doesn’
ser-zykov [4K]

Multiply the cost of the meal by 0.15 ( 15% as a decimal).

8.95 x 0.15 = 1.34

The amount of the discount would be $1.34

Extra:

If you need to find out how much a senior citizen pays, you would subtract the amount of the discount from the original price:

8.95 - 1.34 = $7.61

6 0
1 year ago
Please help me please please ASAP ASAP please ASAP
NeX [460]

Answer:

<h2>45</h2>

Step-by-step explanation:

Well, it is not 90 degrees, as it is not a right angle.

It cannot be 180 degrees as that would be a straight line and a triangle's whole angle measure is 180 degrees.

It is an acute angle, and appears to be half of 90 degrees, so I would have to say 45 degrees.

Not enough information is false because you can infer that it is 45 degrees by looking at it.

Hope that helps!

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