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Anastaziya [24]
3 years ago
12

Solve x2 + 6x + 7 = 0.

Mathematics
1 answer:
Mrrafil [7]3 years ago
7 0

Answer:

x = -6 and -1

Step-by-step explanation:

x^2 + 6x + 7

Factorise- find two numbers that multiply to be 6 and add to be 7: 6 and 1

(x+6)(x+1)

Set each expression equal to 0 and solve

x + 6 = 0   -> x = -6

x + 1 = 0    -> x = -1

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Use the information to answer the question. Sabrina walked from her home to the library she stopped to pick up a book, and then
Tomtit [17]

Answer:

30 minutes to 40 minutes.

Step-by-step explanation:

From the graph attached,

Distance of Sabrina from her home has been given on y-axis and time taken is on x-axis.

Sabrina's walked 2 miles to reach the library in the duration = 30 - 0

= 30 minutes

She stayed at the library from 30 minutes to 40 minutes (Represented by the straight horizontal line).

Then the third segment represents the journey of Sabrina from library to home.

Therefore, Sabrina was at the library between 30 minutes to 40 minutes.

7 0
3 years ago
A fish population in a lake decreases by 2% each year. What is the common ratio? (Write your answer as a decimal)
galina1969 [7]

Answer:

the common ratio is 0.98.

Step-by-step explanation:

A fish population in a lake decreases by 2% each year. We are asked to find the common ratio.

The decrease of population of fish 2% annually means the population becomes next year 100% - 2% = 98%

Therefore, the common ratio would be 98%. Upon converting 98 percent to a decimal we will get,

98% = \frac{98}{100}=0.98

Therefore, the common ratio or decay factor is 0.98.

8 0
2 years ago
Please help i need to finish this
Veseljchak [2.6K]

Answer:

Angle< PQO and Angle < OQP

Step-by-step explanation:

The angle you are naming would be in the middle.

4 0
1 year ago
Read 2 more answers
A rectangle's length, x, is 2 meters greater than its width. If the perimeter of the rectangle is greater than 112 meters, what
Harman [31]

Answer:

The possible length is greater than 29 meters.

Step-by-step explanation:

If the length is x then the width is x - 2  m.

So the perimeter is 2x + 2(x - 2) = 4x - 4 m.

4x - 4 > 112

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x > 29 m.

7 0
3 years ago
A used car costs $6,472. A down payment of $1,000 is required. The remaining balance is to be paid in 36 equal monthly payments.
blondinia [14]
The answer should be $152.

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Divide $5,472 by 36 and you end up with $152.
8 0
3 years ago
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