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erik [133]
3 years ago
5

(5 x 8) x (5 x 8) = ___ squared

Mathematics
2 answers:
yaroslaw [1]3 years ago
5 0
(5×8) × (5×8)
40×40
1,600
natulia [17]3 years ago
3 0
........(5×8) × (5×8) =           40²
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Use the FOIL product to find each product. <br><br> (5y-4)(3y-1)<br><br> Plz help!
elena-14-01-66 [18.8K]
F stands for first: the first term times are 5y and 3y respectively, 5y*3y=15y²
O stands for outside: 5y*(-1)=-5y
I stands for inside: (-4)*(3y)=-12y
L stands for last: (-4)*(-1)=4
add them up: 15y²+(-5y)+(-12y)+4=15y²-17y+4 is the answer. 
6 0
3 years ago
Find the percent of change from 48 people to 53 people. Round to the nearest tenth of a percent if necessary. percent of change
slamgirl [31]
New- original
----------------- *100
  orginal

(53-48)/48 = 0.10416 * 100 = 10.416%
5 0
4 years ago
How do you do this problem?
soldi70 [24.7K]

You make use of the given relationships to write an equation only involving "a".

... a = (sum of three numbers) × (1 + 0.25) . . . . a is 25% more than the sum of three numbers.

Then

... (sum of three numbers) = a/1.25 = 0.8a

The sum of the three numbers and a is given as 783.

... sum of 4 numbers = (sum of three numbers) + a

... 783 = 0.8a + a = 1.8a

... 783/1.8 = a = 435

The appropriate selection is (B) 435.

7 0
4 years ago
Read 2 more answers
HELP!!! Find the exact value of <br> cos A in simplest radical form.
Galina-37 [17]

Answer:

cos A = 9/41

Step-by-step explanation:

cosine is a function that puts together the ADJACENT side of a triangle in a ratio with the HYPOTENUSE.

So from angle A the side length 9 is right next to A so it is the ADJACENT side. The HYPOTENUSE is the longest side ,that is the side length 41.

so cos A = ADJ/HYP

cos A = 9/41

It could be that the directions were confusing bc they said simplest radical form. Many, but not all right triangles have one or more sidesides that have a radical as part of their measure. This triangle doesn't. If you get a radical in the denominator of a ratio, be sure to rationalize so that there is no radical on the bottom.

7 0
2 years ago
(sqrt(6))/(8+\sqrt(10))
valkas [14]

Answer:

\frac{4\sqrt{6}-\sqrt{15}}{27}

Step-by-step explanation:

\frac{\sqrt{6} }{8+\sqrt{10} } \\\\\mathrm{Multiply\:by\:the\:conjugate}\:\frac{8-\sqrt{10}}{8-\sqrt{10}}\\=\frac{\sqrt{6}\left(8-\sqrt{10}\right)}{\left(8+\sqrt{10}\right)\left(8-\sqrt{10}\right)}\\\\\sqrt{6}\left(8-\sqrt{10}\right)=8\sqrt{6}-2\sqrt{15}\\\left(8+\sqrt{10}\right)\left(8-\sqrt{10}\right)=54\\\\=\frac{8\sqrt{6}-2\sqrt{15}}{54}\\\\\mathrm{Factor}\:8\sqrt{6}-2\sqrt{15}:\quad 2\left(4\sqrt{6}-\sqrt{15}\right)\\\\=\frac{2\left(4\sqrt{6}-\sqrt{15}\right)}{54}\\

\mathrm{Cancel\:the\:common\:factor:}\:2\\\\=\frac{4\sqrt{6}-\sqrt{15}}{27}

5 0
3 years ago
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