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Maksim231197 [3]
2 years ago
6

If x^2=20 what is the value of x will give brainliest for answer

Mathematics
1 answer:
Schach [20]2 years ago
8 0

Answer:

x² - 20 = 0

Using the quadratic formula

x =  \frac{ - b± \sqrt{( {b})^{2} - 4ac } }{2a}

a = 1 b = 0 c = -20

So we have

x =  \frac{ - 0 ±  \sqrt{ {0}^{2}  - 4(1)( -20)} }{2(1)}  \\  \\ x =  \frac{± \sqrt{80} }{2}  \\  \\ x =  \frac{±4 \sqrt{5} }{2}  \\  \\  \\ x = ±2 \sqrt{5}  \\  \\  \\ x = 2 \sqrt{5}  \:  \:  \: or \:  \:  \: x =  - 2 \sqrt{5}

Hope this helps you.

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Which expression is equal to 6 x (3 + 8)?
forsale [732]

6 \times (3 + 8) \\  = (6 \times 3) + (6 \times 8)

<u>Answer</u><u>:</u>

(6×3)+(6×8)

Hope you could get an idea from here.

Doubt clarification - use comment section.

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In △ABC, m∠A=16°, m∠B=49°, and a=4. Find c to the nearest tenth.
mars1129 [50]

Answer:

c=13.2 units

Step-by-step explanation:

step 1

Find the measure of angle C

Remember that the sum of the internal angles of a triangle must be equal to 180 degrees

so

A+B+C=180°

substitute the given values

16°+49°+C=180°

65°+C=180°

C=180°-65°=115°

step 2

Find the measure of c

Applying the law of sines

c/sin(C)=a/sin(A)

substitute the given values and solve for c

c/sin(115°)=4/sin(16°)

c=4(sin(115°))/sin(16°)

c=13.2 units

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2 years ago
What is 3/4 as a unit fraction
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Step-by-step explanation:

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One night Ricky and her brother Micky decide to have some fun at their father's sweet shop. In the
vova2212 [387]

Answer:

a) 3034

b)249

Step-by-step explanation:

jellyb beans: 7*135= 945

choc buds: 9*121=1089

smarties: 12*70=840

liquorice sticks: 32*5=160

a) the total number of sweets: 945 + 1089 + 840 + 160 = 3034

b) the difference between the number of choc buds and the number of smarties: 1089 - 840 = 249

<em>P.S. Hope it helps. If you have any questions, feel free to ask them in the comment section below. I'll be happy to help. Have a wonderful day!</em>

8 0
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