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VARVARA [1.3K]
3 years ago
13

Help Me Number 6 or if you can help me with number 7 if you want too ☺️

Mathematics
1 answer:
Makovka662 [10]3 years ago
7 0
Simply use the formula they give you. For question 6, 4 is the radius. So the area of the circle is 4pi. Now for seven you do the same thing, but they gave you the diameter instead and it’s a half circle. So try that one on your own. Let me know if you get stuck
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Write an expression to represent: seven less than the product of two and a number x
Salsk061 [2.6K]

Answer:

2x-7

Step-by-step explanation:

Use this site to refer to in the Future :) https://www.mathcelebrity.com/algexpress.php

7 0
3 years ago
Please explain how to do this and still get the answer 16. Thank you!
Kitty [74]
(j-3)8=104
8j-24=104
8j=128
j=16

5 0
3 years ago
Convert 98.76° from degrees to radians. =3.14. Round to three<br> decimal places.
Novosadov [1.4K]

Answer:

98.7° × π/180 = 1.723rad

Step-by-step explanation:

4 0
3 years ago
If a^2+1/a^2=79 where (a&gt;0), find the value of a^3 +1/a^3
Nastasia [14]

Note the binomial expansion,

(<em>a</em> + 1/<em>a</em>)³ = <em>a</em> ³ + 3<em>a</em> + 3/<em>a</em> + 1/<em>a</em> ³

so

<em>a</em> ³ + 1/<em>a</em> ³ = (<em>a</em> + 1/<em>a</em>)³ - 3 (<em>a</em> + 1/<em>a</em>)

Similarly,

(<em>a</em> + 1/<em>a</em>)² = <em>a</em> ² + 2 + 1/<em>a</em> ²

We're given <em>a</em> ² + 1/<em>a</em> ² = 79, so

(<em>a</em> + 1/<em>a</em>)² - 2 = 79

(<em>a</em> + 1/<em>a</em>)² = 81

<em>a</em> + 1/<em>a</em> = ±9

but <em>a</em> > 0, so we ignore the negative solution.

Then

<em>a</em> ³ + 1/<em>a</em> ³ = 9³ - 3×9 = 702

7 0
3 years ago
The circumference of a circle is 13π m. What is the area, in square meters? Express your answer in terms of π π.
Deffense [45]

Answer:

13×(22/7)whole square

4 0
3 years ago
Read 2 more answers
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