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masha68 [24]
3 years ago
5

Two equations are given below:

Mathematics
1 answer:
goldenfox [79]3 years ago
4 0
Since the second equation gives a value for a, we can substitute it into the other equation to find a value for B.

Let's substitute b-2 into the first equation wherever there is an a.

a - 3b = 4
(b-2) - 3b = 4
b - 2 - 3b = 4
-2 - 2b = 4
-2b = 6
b = -3

Now let's find a by substituting -3 into either of the equations to find the value of a.

a = b - 2
a = -3 - 2
a = -5

So your solution set  is (-5, -3)
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Let a=2018, we can rewrite the question into

(a-1)(a^9+a^8+...+a^2+a+2)\\=(a-1)(a^9+a^8+...+a^2+a+1)+(a-1)\\=a^{10}-1+a-1

substitute back a = 2018, obtained

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Answer:

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Step-by-step explanation:

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Lionel uses two functions to model the costs of having a problem diagnosed and repaired by two appliance repair companies. He mo
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The function (119x + 171) represents the amount, in dollars. Lionel will save 409 $ if he uses Quality Electric for a repair needing 2 hours of labor.

<h3>What is a system of equations?</h3>

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

The system of equations are;

p(x) = 68x + 81.

q(x) = 51x + 90.

So,

p(x) + q(x) = 68x + 81 + 51x +  90

p(x) + q(x) = 119x + 171

The function (119x + 171) represents the amount, in dollars, Lionel will save by having Quality Electric handle an x-hour repair instead of Phil’s Appliances.

p(x) + q(x) = 119x + 171

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p(x) + q(x) = 119 (2) + 171

p(x) + q(x) = 409

Lionel will save 409 $ if he uses Quality Electric for a repair needing 2 hours of labor.

Learn more about equations here;

brainly.com/question/10413253

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4 0
3 years ago
Renee was able to plant 15 plant in 5min at this rate how many flowers could she paint plant in 45 min
Sedbober [7]

Answer:

Answer is 135 plant

Step-by-step explanation:

We have given that,

In 5 min Renee can plant 15 plant.

That means in one minute Renee can plant \frac{15}{5} plant.

i.e. Rate of planting = 3 plant per minute

So, In 45 minutes , she can plant  45×3 plant

i.e Plant she can plant in 45 minute = 135 plant

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3 years ago
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