All categories

2 years ago

Solve the quadratic equation by using either a numeric or a graphic approach.

Mathematics

1 answer:

dimulka [17.4K]2 years ago

4 0

Answer:

Step-by-step explanation:

x²-14x-49=0

x²-14x+49=49+49

(x-7)²=98

(x-7)²=49×2

x-7=±7√2

x=7+7√2=7(1+√2)≈7(1+1.414)≈7(2.414)≈16.898≈16.9

x=7-7√2=7(1-√2)≈7(1-1.414)≈-7×0.414≈-2.898≈2.9

You might be interested in

2) A fair coin was tossed 75 times. The coin landed on Heads 42 times and Tails 33 times. What is the experimental probability o

coldgirl [10]

Answer:

$\frac{11}{25}$

Step-by-step explanation:

In the experiment that was conducted the coin was tossed a total of 75 times and out of those times it only landed on tails 33 times. Therefore the experimental probability of the coin landing on tails can be calculated by the dividing the times it landed on tails by the total number of times it was tossed. Like so...

$\frac{33}{75}$ or 0.44

This fraction can also be simplified to its simplest form of $\frac{11}{25}$ which is obtained by dividing both the numerator and denominator by 3

5 0

3 years ago

a frog is at the bottom of a 25 foot well. each day he climbs up 3 feet, and each night he slips down 2 feet. how many days will

klemol [59]

25. he goes up by one foot (3 minus 2) each day and night, so 25.

6 0

1 year ago

Someone who’s good at maths help this is rlly important I’ll brainlist u!!!! do the ones u know ig.

WITCHER [35]

Answer:

i - 6d/0.5

that's all i remember ive done this before but my memory is wack, im sorry

8 0

2 years ago

Read 2 more answers

How many solutions does the equation −4y + 4y + 2 = 2 have? (1 point) a Two b None c One d Infinitely many

elena55 [62]

Answer:

Infinity

Step-by-step explanation:

-4y + 4y + 2 = 2

2 = 2 = always true

6 0

3 years ago

Read 2 more answers

I seriously am stuck please help me

Blababa [14]

$\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ P(\stackrel{x_1}{-4}~,~\stackrel{y_1}{-2})\qquad Q(\stackrel{x_2}{4}~,~\stackrel{y_2}{3})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ PQ=\sqrt{[4-(-4)]^2+[3-(-2)]^2}\implies PQ=\sqrt{(4+4)^2+(3+2)^2} \\\\\\ PQ = \sqrt{8^2+5^2}\implies PQ=\sqrt{64+25}\implies PQ=\sqrt{89}\implies \stackrel{\textit{rounded up}}{PQ = 9.4}$

7 0

3 years ago

Read 2 more answers