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Marianna [84]
2 years ago
7

What's the first step of solving -x^2-4x+16=0 ??? NOW!

Mathematics
1 answer:
MaRussiya [10]2 years ago
5 0

Answer:

Step-by-step explanation:

Use the Quadratic Formula.

-x² - 4x + 16 = 0

x = [4±√(4²-4(-1)(16)]/[2(-1)] = [4±√80]/(-2) = [4±4√5]/(-2) = -2±2√5

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During your cycling trip, you and your friends often stayed in hostels. The prices of these are listed below.
kiruha [24]

Answer:

  • a) NTRD standard price = $26.30
  • b) range: $11.20 to $33.00, a range of $21.80

Step-by-step explanation:

a) The average is the sum divided by the number of contributors. Let n represent the standard price at Night-Time Rest Days. Then ...

... ($22.45 +18.55 +24.50 +11.20 +n)/5 = $20.60

... 76.70 + n = 103.00 . . . . multiply by 5 and collect terms

... n = $26.30 . . . . standard price at NTRD

b) The lowest standard price is $11.20. The highest breakfast price is $33.00. The range is the difference between these ...

... $33.00 -11.20 = $21.80 . . . . range in cost for a single night

7 0
3 years ago
The following two triangles have the same angles, and are similar. What is the ratio of height to base for the triangles?
alexgriva [62]
Height to base =  3 : 4  or 0.75
3 0
3 years ago
Read 2 more answers
Can someone help me with this question its overdue
Kryger [21]

Answer:

????????????????? where is the question.?

8 0
2 years ago
Factor 9x 6 – 16y 6 completely.
il63 [147K]
Please use the symbol " ^ " to denote exponentiation:  9x^6 = (___)^2.

Note that 9x^6 = 3^2*(x^3)^2.  Thus,

9x^6 = (___)^2 becomes (3x^3)^2.

Then    <span>9x^6 – 16y^6 = (3x^3)^2 - (4y^3)^2 = ((3x^3) - (4y^3))[(3x^3) +(4y^3)]</span>
5 0
3 years ago
I NEED HELP ASAP write an equivalent unit rate to running 5/4 a mile in 9 minutes
svetlana [45]

Answer:

The unit rate is 0. 14 miles per minute.

Hence, option a is correct.

Step-by-step explanation:

Given

Running of 5/4 a mile in 9 minutes.

To determine

The unit rate = ?

Given that the running 5/4 a mile in 9 minutes.

i.e.

Miles covered in 9 minutes = 5/4 or 1.25 miles

Miles covered in 1 minute = 1.25/9

                                           = 0. 14 miles per minute

Therefore, we conclude that:

The unit rate is 0. 14 miles per minute.

Hence, option a is correct.

6 0
3 years ago
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