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2 years ago

Find the value of 2a² + 5b² when a= -6 and b= 2

Mathematics

2 answers:

sashaice [31]2 years ago

4 0

2(-6^2)+5(2^2)
2(36)+5(4)
72+20
92

poizon [28]2 years ago

3 0

Plug in the values -6 into 'a' and 2 into 'b'.

2a² + 5b²
2(-6)² + 5(2)²
First solve the exponents ⇒ -6² means -6 * -6, which equals 36
2² = 2*2 = 4

2(36) + 5(4)
2*36 → 72
5*4 = 20
72 + 20 = 92

Final answer → 92

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Vanyuwa [196]

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2 years ago

Whats the distance between the points (2, 7) and (2, 15)

sveta [45]

Answer:

The distance between the points (2, 7) and (2, 15) is 8.

Step-by-step explanation:

<u>What is the Distance between Two Points?</u>

For any two points there is exactly one line segment connecting them. The distance between two points is the length of the line segment connecting them. Note that the distance between two points is always positive. Segments that have equal length are called congruent segments.

How to Solve:

Formula:

$\sqrt{(x2-x1)^2+(y2-y1)^2}$

Putting Values:

$=\sqrt{(2-2)^2+(15-7)^2}$

$=\sqrt{(0)^2+(8)^2}$

$=\sqrt{0+64}$

$=\sqrt{64}$

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7 0

2 years ago

24x^2-55x-24=0 what does x equal?

damaskus [11]

The answer is 2.667.

7 0

3 years ago

The number of bacteria growing in an incubation culture increases with time according to n left parenthesis t right parenthesis

Anon25 [30]

For this case we have the following function:
n (t) = 2400 * (5) ^ t
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60000 = 2400 * (5) ^ t
We clear the value of t.
For this we use the logarithm:
(5) ^ t = 60000/2400
log5 ((5) ^ t) = log5 (60000/2400)
t = log5 (60000/2400)
t = 2 days
Answer:
the number of bacteria in the culture will be 60 comma 000 after:
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5 0

3 years ago

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Answer:

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Step-by-step explanation:

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