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2 years ago

Factor: 28k^3-24k^2+49k-42 I will give Brainliest to the first person :)

Mathematics

2 answers:

GrogVix [38]2 years ago

7 0

Answer:

$(7k - 6) (4k^{2} + 7)$

Step-by-step explanation:

$28k^{3} - 24k^{2} + 49k - 42$

$= (28k^{3} - 24k^{2}) + (49k - 42)$

$= 4k^{2} (7k - 6) + 7 (7k - 6)$

$= (7k - 6) (4k^{2} + 7)$

seropon [69]2 years ago

5 0

Answer:

$(4k^2+7)(7k-6)$

Step-by-step explanation:

Factor each half of the expression separately:

$4k^2(7k-6)+7(7k-6)$

Since both 4k² and 7 are being multiplied by (7k-6), we can combine them to get:

$(4k^2+7)(7k-6)$

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A rectangle with a perimeter of 19m^2+2m-10 and a width of m^2 write an expression for the lenght

expeople1 [14]

Answer:

$8.5m^{2}+ m -5$

Step-by-step explanation:

Since perimeter, $P=19m^{2}+ 2m -10$ and we know that P=2(l+w) then $P=2(l+m^{2})=2l+2m^{2}$

The length will be $2l=19m^{2}+ 2m -10-2m^{2}=17m^{2}+ 2m -10$

Now $l=8.5m^{2}+ m -5$

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3 years ago

X² + y² = 8

ohaa [14]

Answer:

$(2,2)~ \text{and}~ (-2,-2)$

Step by step explanation:

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2 years ago

The length of the diving board is 378 centimeters what is iys length in meters

Alina [70]

1 meter=100 centimeters

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3 years ago

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Use the data in LAWSCH85 for this exercise. (i) Using the same model as in Problem 4 in Chapter 3, state and test the null hypot

natka813 [3]

Answer:

Step-by-step explanation:

In the model

Log (salary) = B0 + B1LSAT +B2GPA +B3log(libvol) +B4log(cost)+B5 rank+u

The hypothesis that rank has no effect on log (salary) is H0:B5 = 0. The estimated equation (now with standard errors) is

Log (salary) = 8.34 + .0047 LSAT + .248 GPA + .095 log(libvol)

(0.53) (.0040) (.090) (.033)

+ .038 log(cost) – .0033 rank

(.032) (.0003)

n = 136, R2 = .842.

The t statistic on rank is –11(i.e. 0.0033/0.0003), which is very significant. If rank decreases by 10 (which is a move up for a law school), median starting salary is predicted to increase by about 3.3%.

(ii) LSAT is not statistically significant (t statistic ≈1.18) but GPA is very significance (t statistic ≈2.76). The test for joint significance is moot given that GPA is so significant, but for completeness the F statistic is about 9.95 (with 2 and 130 df) and p-value ≈.0001.

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3 years ago

Jake is 50cm tall. Mike is 12cm taller than Jake. Tim is 11cm taller than Mike. How tall is Tim?

igor_vitrenko [27]

You do (50+12)+11 to get Tim's height.
Mike Plus Taller

Which is... 73 cm!!
Easy, right? Except that it is like 2 ft tall...

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3 years ago

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