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Zanzabum
3 years ago
8

Y = x^2+8x-7 Use the formula x=-b/2a

Mathematics
1 answer:
Butoxors [25]3 years ago
7 0

b = 8

a = 1

using the formula given

x = -8/2

x = -4

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The sum of 2x+7 and −x+12 is equal to 14 what is x?
Alekssandra [29.7K]

Answer:-5


Step-by-step explanation:

2x+7-x+12=14

x+19=14

x=-5

                 


4 0
3 years ago
Ex. 11 An apple computer has a retail price of $1000. Jim's House of Electronics is having a "20%-off sale",
Elina [12.6K]
He would have to pay $560 because if you take 20% off of the computer using the equation 1000 - (1000 * 0.20) you get 800. This means that the 30% coupon is applied to $800, so using the same template as the equation above, we can do 800 - (800 * 0.30) to get a final answer of 560.
8 0
1 year ago
Suppose a city with population of 400,000 has been growing at a rate of ​5% per year. If this rate​ continues, find the populati
kakasveta [241]

The number of years value isn't given, we could use an hypothetical value, which can be substituted for the correct number of years given in your exercise in other to find the exact answer.

Using a t value of 10 years

Answer:

651558

Step-by-step explanation:

Given that:

Initial population, P0= 400,000

Growth rate, r = 5%

Using the relation :

P(t) = P0 * (1 + r)^t

t = number of years = 10

P(10) = 400000 * (1 + 0.05)^10

P(10) = 400000 * (1.05)^10

P(10) = 400000 * 1.628894626777

P(10) = 651557.8507

= 651558 nearest whole number.

Recall that, the t value used is hypothetical and should be replaces with te exact value given in your question.

7 0
2 years ago
The Quality Assurance department at a gear company
exis [7]
Answer:
0.6%??


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4 0
3 years ago
Can someone please help with this question
Alina [70]

The Pythagorean Theorem is a^2 +b^2 = c^2, where a and b are the sides and c is the hypotenuse ( angled line).


3.

a^2 + 6^2 = 18^2

a^2 + 36 = 324

a^2 = 324 - 36

a^2 = 288

a =√288

a = 12√2


4.

a^2 + 3^2 = 9^2

a^2 + 9 = 81

a^2 = 81-9

a^2 = 72

a = √72

a = 6√2

5 0
3 years ago
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