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3 years ago

Help! I can’t figure this out!

Mathematics

1 answer:

Rama09 [41]3 years ago

5 0

The image is blurry what’s the question?

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How do you identify quadratic equations?

alisha [4.7K]

Often the easiest method of solving a quadratic equation is by factoring. Factoring means finding expressions that can be multiplied together to give the expression on one side of the equation. ... The equation x2+x−6=0 x 2 + x − 6 = 0 is in standard form.

8 0

3 years ago

Gary is studying the prevalence of regional dialects. He surveyed 351 people in a region and asked what words they used for cert

chubhunter [2.5K]

Answer:

Confidence interval = ( 0.7991, 0.8647 )

Step-by-step explanation:

Sample size = n = 351

number of successes = X = 292

Sample proportion = P = $\frac{X}{n}$

= $\frac{292}{351}$

= 0.831908831

confidence interval = 90%

Critical Z value = 1.6449 [by using excel]

Confidence interval = P ± Z $\sqrt{P\frac{(1-P)}{n}}$

Where P = Sample proportion

Z = critical value

n = sample size

Confidence interval = 0.831908831 ± 1.6449 $\sqrt{0.831908831\frac{(1-0.831908831)}{351}}$

= 0.831908831 ± 1.6449 × 0.0200

= 0.831908831 ± 0.032898

Lower limit = 0.831908831 - 0.032898 = 0.7991

Upper limit = 0.831908831 + 0.032898 = 0.8647

Confidence interval = ( 0.7991, 0.8647 )

4 0

3 years ago

How many pounds of candy that cells for $0.66 per Ib must be mixed with candy that sells for $1.31 per Ib to obtain 9 Ib of a mi

faltersainse [42]

Answer: $\frac{306}{65}$ pounds

Step-by-step explanation:

Let x pounds of $ 0.66 per lb candies mixed with y pounds of $ 1.31 per lb candies to obtain 9 lb of $ 0.97 per lb candies,

Hence, we can write,

x + y = 9 ------- (1)

And, 0.66 of x + 1.31 of y = 0.97 of (x + y)

⇒ 66 x + 131 y = 97 (x+y)

⇒ 66 x +131 y - 97 x - 97 y = 0

⇒ -31 x + 34 y = 0 ------(2)

By solving equation (1) and (2)

We get,

$x=\frac{306}{65}$ and $y=\frac{279}{65}$

Hence, the quantity of 0.66 per lb candies = $\frac{306}{65}$ pounds

7 0

3 years ago

How to solve x in a step by step response

ivanzaharov [21]

Step 1: Simplify both sides of the equation.x2−7=9Simplify: (Show steps)12x−7=9Step 2: Add 7 to both sides.12x−7+7=9+712x=16Step 3: Multiply both sides by 2.2*(12x)=(2)*(16)x=32

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3 years ago

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In 2019, the average full-time worker in the U.S. spent `8.5` hours working each workday. This is an increase on the average of

kvv77 [185]

Answer 2019 /0.0047 /2014/ 0.493

Step-by-step explanation:

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3 years ago