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lord [1]
3 years ago
6

What is a 5a − 8 = 8 + a

Mathematics
2 answers:
stira [4]3 years ago
8 0

Well since both sides have to equal the same thing A will have to make them true

it can be 5x A=3 so 5x3=15 -8=7 so the other side has to be the same amount

8+ -1 =7 so A can be 7 and -1

In-s [12.5K]3 years ago
3 0

Answer:

a=4

Step-by-step explanation:

5a-8=8+a

4a-8=8

4a=16

a=4

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Given the following geometric sequence, find the common ratio:<br><br> {225, 45, 9...}
Tom [10]

Answer:

\frac{1}{5}  is the common ratio

Step-by-step explanation:

Common ratio(r) states that the ratio of each term of a geometric sequence to the term preceding it.

r = \frac{a_2}{a_1} =\frac{a_3}{a_2}........\frac{a_{n+1}}{a_n}

Given the sequence:

225, 45, 9, .........

Here,

a_1 = 225

a_2 = 45

a_3 = 9 and so on...

Using definition to find r.

r = \frac{45}{225}=\frac{9}{45}......

After solving we get;

r = \frac{1}{5}

Therefore, the common ratio is, \frac{1}{5}

8 0
3 years ago
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The original cost of an item is $68, but you have to pay $76.16.
Sonja [21]

Answer:

12%

Step-by-step explanation:

calculator

7 0
3 years ago
The equation of a circle is given as x2+ax+y2+by=c where a, b, and c are constants. The radius of the circle is given by the exp
Lady bird [3.3K]
B because if the circle has a radius of x2 the 1/2 of that would be a+c bringing in c to become abc or a+b+c
7 0
2 years ago
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Simplify this algebraic expression completely. <br> 6x – 4(x + 3)
Arturiano [62]
6x - 4(x + 3)
6x -4x -12. Distribute
2x - 12. Combine like terms
5 0
3 years ago
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Krypton-91 is a radioactive substance that decays very quickly. The function Q(t)=Qoe^-kt models radioactive decay of krypton-91
Masteriza [31]
The "k" value should have units and should be negative.
k = -.07 / seconds
Half-Life = ln (.5) / k
Half-Life = ln (.5) / -.07
Half-Life = -.693147 / -.07
Half-Life = 9.9 seconds
(actually, wkpedia says half-life of Krypton 91 is 8.57 seconds)

elapsed time = half-life * log (bgng amt / end amt) / log (2)
elapsed time = 9.9 * log (100 / 10) / 0.30102999566
elapsed time = 9.9 * 1 / 0.30102999566
<span><span>elapsed time = 9.9 * 3.3219280949 </span>
</span><span><span><span>elapsed time = 32.8870881395 </span> </span> </span>
<span>elapsed time = 32.89 seconds (rounded)

Source:
http://www.1728.org/halflife.htm

</span>
6 0
3 years ago
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