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3 years ago

Help me with math plz ASAP please

Mathematics

2 answers:

Marina86 [1]3 years ago

5 0

(-3)(7) = -21.

y^8 and c^3 have different bases (y and c) and thus cannot be merged.

So we end up with -21c^3y^8.

Sidana [21]3 years ago

5 0

Answer:

$\large\boxed{-21c^3y^8}$

Step-by-step explanation:

$-3y^8\cdot7c^3=(-3\cdot7)(y^8c^3)=-21c^3y^8$

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Given sinx=0.9 , what is cosx ?

Scorpion4ik [409]

$\bf \textit{Pythagorean Identities}
\\ \quad \\
sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta)
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cos(\theta)=\pm\sqrt{1-sin^2(\theta)}\\\\
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thus
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cos(x)=\pm \sqrt{1-(0.9)^2}$

8 0

3 years ago

Evarado paid 1:12 for a dozen eggs at his local grocery store. Determine the cost of 3 eggs

Bond [772]

.25 for each egg because $1:12 eggs means 1/12 = .25/3

3 0

3 years ago

14. Solve the Quadratic equation by the<br>method of completing square 3x2 - 8x - 3

Anna007 [38]

Answer:

x = -1/3 and x = 3

Step-by-step explanation:

I'm not sure, but I think you mean 3x^2 - 8x - 3 = 0

In that case:

1. Add 3 on both sides

3x^2 - 8x -3 + 3 = 3 -> 3x^2 - 8x = 3

2. Divide both sides by 3

x^2 - 8/3x = 1

3. Add ((8/3)/2)^2 to both sides

x^2 - 8/3x + ((8/3)/2)^2 = 1 + ((8/3)/2)^2

4. Simplify

x^2 - 8/3x + (4/3)^2 = 1 + (4/3)^2

x^2 - 8/3x + 16/9 = 1 + 16/9

5. Rewrite x^2 - 8/3x + 16/9 = 1 + 16/9 as a perfect square

and simplify 1 + 16/9

(x - 4/3)^2 = 25/9

6. Find the square root of both sides

$\sqrt{ (x -4/3)^2} = \sqrt{25/9}$

7. Simplify

(x - 4/3) = ±5/3

8. Rewrite the equation as two seperate equations

(x - 4/3) = ±5/3 ->

a. (x - 4/3) = 5/3

b. (x - 4/3) = -5/3

9. Solve for x by isolating the variable (add 4/3 to both sides)

a. x = 5/3 + 4/3

b. x = - 5/3 + 4/3

10. Simplify

a. x = 9/3 -> x = 3

b. x = -1/3

3 0

4 years ago

A.) 10.9<br> B.) 8.6<br> C.) 7.3

Harlamova29_29 [7]

Answer:

Option (c) 7.3

Step-by-step explanation:

Since is forms a right angled traingle,

a= 3+4= 7

b = 4-2= 2

c = AB

Pythagorean theorem:

a^2+b^2 = c^2

So since we know a and B but the hypotenuse (c) is missing

7^2 + 2^2 = c^2

c^2 = 49+4

= 53

c = √53

= 7.28 rounded off to 7.3

So the length of hypotenuse or c is 7.3 units

Therefore, the length is 7.3

5 0

3 years ago

IS IT C OR D?! HELP ME PLS

NNADVOKAT [17]

Answer:

Step-by-step explanation:

To find this, we need to find the points that are the steepest (or have larger slope). We have the points (2, 3), (4, 11), and (6, 23). The line that has (2, 3) and (4, 11) has a slope of 4, and the line with (4, 11) and (6, 23) has a slope of 6. Therefore the answer is D.

Note: Simple eyeballing will do the trick too!

7 0

3 years ago