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solniwko [45]
2 years ago
8

Solve the equation by factoring,2x^2=28-x

Mathematics
1 answer:
valkas [14]2 years ago
5 0

Answer:x = -4

x = 7/2

Or

x= 3.500

Step-by-step explanation:

Pls mark brainliest

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Find (a) the slope of the curve at the given point P, and (b) an equation of the tangent line at P: y = 9x^2 + 5 ; P (2,41)
Flauer [41]

Answer:

(a) 36

(b) y = 36x-31

Step-by-step explanation:

(a) dy/dx = 18x

slope of tangent at (2, 41) = 18(2)

= 36

(b) using y-y1 = m(x-x1)

y-41 = 36(x-2)

y = 36x-31

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3 years ago
13 km<br><br> 5 km<br> What is the length of the missing leg?
ale4655 [162]
Pythagoras' theorem:
b^2 = c^2 - a^2
Substitute in the values:
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3 years ago
A large emerald with a mass of 378.24 grams was recently discovered in a mine. If the density of the emerald is 2.76 grams over
stepan [7]

Answer:

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Step-by-step explanation:

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5 0
2 years ago
Read 2 more answers
To estimate μ, the mean salary of full professors at American colleges and universities, you obtain the salaries of a random sam
GenaCL600 [577]

Answer:

<h3>73220±566.72</h3>

Step-by-step explanation:

The formula for calculating the confidence interval is expressed as;

CI = xbar ± z*s/√n

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z is the z score at 99% CI = 2.576

s is the standard deviation = $4400

n is the sample size = 400

Substitute the given values into the formula;

CI = 73,220 ± 2.576*4400/√400

CI = 73,220 ± 2.576*4400/20

CI = 73,220± (2.576*220)

CI = 73220±566.72

Hence a 99% confidence interval for μ is 73220±566.72

5 0
2 years ago
Each table in a classroom is 100cm long and 50cm wide. what is the area of each table? there are 16 tables in the classroom. wha
lord [1]

Answer:

A

Step-by-step explanation:

3 0
2 years ago
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