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Gekata [30.6K]
4 years ago
5

Help with these math questions multiple choice

Mathematics
1 answer:
Mrrafil [7]4 years ago
4 0

22. the second one: 4/15x

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Rewrite the equation by completing the square. 4 x^{2} +20x +25 =0
Ede4ka [16]

Answer:

(x+5/2)^2 = 0

Step-by-step explanation:

4 x^{2} +20x +25 =0

Divide by 4

4/4 x^{2} +20/4x +25/4 =0

x^2 +5x +25/4 =0

Subtract 25/4 from each side

x^2 +5x +25/4 -25/4 =-25/4

x^2 +5x  =-25/4

Take the coefficent of x

5

Divide by 2

5/2

Square it

25/4

Add it to each side

x^2 +5x +25/4 =-25/4+25/4

(x+5/2)^2 = 0

Take the square root of each side

x+5/2 = 0

x = -5/2

8 0
3 years ago
Read 2 more answers
Driven any two two number witch is greater the lcm of the number or gcf of the the number?why?
avanturin [10]
Lcm because a multiple is always greater then a factor.
4 0
3 years ago
Multiply the following complex numbers: (7+2i)(2+3i)
Law Incorporation [45]

When u multiply these two u should get 6i^2+25i+14.

7 0
3 years ago
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How to find the measure of the angle is you have the incenter?
Eduardwww [97]
Construct<span> a perpendicular from the </span>incenter<span> to one side of the triangle to locate the exact radius. 3. place compass point at the </span>incenter<span> and measure from the center to the point where the perpendicular crosses the side of the triangle</span>
7 0
3 years ago
What is the answer to <br> 3r^2 - r = 0
n200080 [17]
<span><span> r = -1/3 = -0.333
</span><span> r = 0</span></span>
4 0
3 years ago
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