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3 years ago

Using quadratic formula , give your answer as specified x2+4x-1=0 (exact root)

Mathematics

1 answer:

elena-s [515]3 years ago

7 0

Answer: (-2+√5), (-2-√5)

Step-by-step explanation:

1. Reference the formula: [(-b±(√b^2-4ac))/2a]

2. Plug in the values from the equation: [(-4±(√16+4))/2]

3. Simplify: [(-4±(√20))/2]

4. Simplify the root: [(-4±(2√5))/2]

5. Simplify the fraction: [-2±√5]

6. There's your answer: (-2+√5), (-2-√5)

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Help plz. It’s number 6. Thanks

julsineya [31]

A = 1/2 h (a+b)
A / 1/2 h = a + b
A / 1/2 h - b = a

a = A / 1/2 h - b

Hope this helps

7 0

3 years ago

Sound travels about 340 m/s. The function d(t)=340t gives the distance d(t), in meters, that sound travels in t seconds. How f

bekas [8.4K]

Answer:

18020 meters.

Step-by-step explanation:

(340*53) meters

= 18020 meters

Hope this helped!

5 0

3 years ago

Read 2 more answers

Please answer right away

spayn [35]

Answer:

The correct answer option is $\frac { 4 } { 4 9 }$ .

Step-by-step explanation:

We are to find the probability that both your parents were born on weekend (either Saturday or Sunday).

Total number of days in a week = $7$

Number of days in weekend = $2$

Probability of being born on weekend = $\frac { 2 } { 7 }$

P (both parents were born on weekend) = $\frac{2}{7} \times \frac{2}{7}$ = 4/49

3 0

3 years ago

3(n-4)=9 what is the answer please telll me

xxTIMURxx [149]

Answer:

n = 7

Step-by-step explanation:

3(n - 4) = 9

3n - 12 = 9

3n = 9 + 12

3n = 21

n = 21 ÷ 3

n = 7

5 0

4 years ago

Find the distance between the points (8,3) and (2,7) the answer must be a whole number

Greeley [361]

Answer:

let (8,3) be (x1,y1)

(2,7) be (x2,y2)

using distance formula

√[(x2-x1)²+(y2-y1)²]

√(2-8)²+(7-3)²

√(36+16)

√52

4 0

3 years ago