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Igoryamba
3 years ago
5

I'm doing elimination in systems of equations how do I solve this?????? Help!!!

Mathematics
1 answer:
Eddi Din [679]3 years ago
7 0
X-3y=-5
-(x+3y=1)
-------------
-6y=-6
y=1
x=-2

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Correct function combinations to x2-7x-18
Natasha_Volkova [10]

The factors of the function after factorization f(x)=x^{2} -7x-18 is (x+2) and (x-9)

Given Function  f(x)=x^{2} -7x-18 and we have to find the factors of the given function.

The function whose factors are to be found is   f(x)=x^{2} -7x-18

Factorization means finding various expressions which when together multiplied will give the  function itself. Correct combination can only be found by finding the factors of the function. Without finding factors no one can find the solution of an equation or expression also.

f(x)=x^{2} -9x+2x-18

=x(x-9)+2(x-9)

=(x+2)(x-9)

Hence the  factors which when combine together gives function f(x)=x^{2} -7x-18 are (x+2)(x-9).

Learn more about factorization at brainly.com/question/25829061

#SPJ10

8 0
2 years ago
HELP PLEASE!!!!!!!!!!!!
Naily [24]

Answer:

34,B

Step-by-step explanation:

7 0
3 years ago
Which number should each side of the equation 4/5x=8 be multiplied by to produce the equivalent equation of x = 10?
vagabundo [1.1K]
U would multiply both sides by 5/4
8 0
4 years ago
Briefly discuss the difference between indefinite integral and definite integral. Give an example to provide emphasis. *​
e-lub [12.9K]

Answer:

A definite integral represents a number when the lower and upper limits are constants. The indefinite integral represents a family of functions whose derivatives are f. The difference between any two functions in the family is a constant.

Step-by-step explanation:

7 0
3 years ago
Commute times in the U.S. are heavily skewed to the right. We select a random sample of 500 people from the 2000 U.S. Census who
tresset_1 [31]

Answer:

<em>|t|  =  2.739 > 1.972 at 0.05 level of significance</em>

<em>Null hypothesis is rejected  at 0.05 level of significance</em>

<em>The researchers able to conclude from this data that the mean commute time in the U.S. is less than half an hour</em>

<u>Step-by-step explanation</u>:

<u>Step(i)</u>:-

Given sample size n = 500

Given data

<em>mean of the sample x⁻ = 27.6 minutes</em>

<em>Standard deviation of the sample (S) =  19.6 minutes</em>

<em>Mean of the Population 'μ' = half an hour or 30 minutes</em>

<em>Level of significance ∝ =0.05</em>

t₀.₀₅ = 1.972

<u><em>Step(ii):</em></u>-

<u><em>Null hypothesis :H₀</em></u>: <em>μ= 30</em>

<u><em>Alternative Hypothesis :H₁:</em></u> <em>μ < 30</em>

Test statistic

    t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }

   t = \frac{27.6 -30}{\frac{19.6}{\sqrt{500} } }

 t = - 2.739

|t| = |-2.739| = 2.739

<u><em>Final answer</em></u>:-

<em>|t|  =  2.739 > 1.972 at 0.05 level of significance</em>

<em>Null hypothesis is rejected  at 0.05 level of significance</em>

<em>The researchers able to conclude from this data that the mean commute time in the U.S. is less than half an hour</em>

<em></em>

5 0
4 years ago
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