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juin [17]
3 years ago
5

Theo started to solve the quadratic equation (x + 2)2 – 9 = –5. He added 9 to both sides and the resulting equation was

Mathematics
2 answers:
chubhunter [2.5K]3 years ago
7 0

Answer:

( x + 2 ) = 2

Step-by-step explanation:

Theo started to solve the quadratic equation

( x+2 )² - 9 = -5

He added 9 to both sides

( x + 2 ) ² -9 + 9 = - 5 + 9

         ( x + 2 )² = 4

Now he took the square root  of each side

\sqrt{(x+2)^{2} } = \sqrt{4}

\sqrt{(x+2)^{2} } =\sqrt{2^{2} }

( x + 2 ) = 2

Therefore, resulting equation will be ( x + 2 ) = 2

anzhelika [568]3 years ago
4 0

square root of (x+2)^2 = x+2

square root of 4 = 2

so equation will now be x+2 =2

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A point M on a segment with endpoints X (1, −2) and Y (10, 3) partitions the segment in a 5:1 ratio. Find M. You must show all w
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The coordinates of point M which divides the line segment having end points (1,-2) and (10,3) in 5:1 are (17/2,13/6).

Given that the end points of line segment  are X(1,-2) and Y(10,3) and the ratio in which the line segment is being divided is 5:1.

Line segment is a collection of points which when together joined joins two points on a surface.

The coordinates of point dividing a line segment with end points (x_{1} ,y_{1} ),(x_{2} ,y_{2} ) and ratio m:ncan be calculated using the below given formula:

(X,Y)=(mx_{2} +nx_{1} /m+n,my_{2} +ny_{1} /m+n).

We have to just put the values in the above formula to get the  coordinates.

(X,Y)=(5*10+1*1/5+1,5*3-2*1/5+1)

=(50+1/6,15-2/6)

=(51/6,13/6)

=(17/2,13/6)

Hence the coordinates of point M which divides the line segment having end points (1,-2) and (10,3) in 5:1 are (17/2,13/6).

Learn more about line segment at brainly.com/question/2437195

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8 0
2 years ago
How many times does 280 go into 27?
mojhsa [17]
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7 0
3 years ago
Two chemical companies can supply a raw material. The concentration of a particular element in this material is important. The m
svp [43]

Answer:

As the calculated F lies in the acceptance region therefore we conclude that there is not sufficient evidence to support the claim that the variability in concentration may differ for the two companies. Hence Ha is rejected and H0 is accepted.

Step-by-step explanation:

As we suspect the variability of concentration F - test is applied.

n1=10    s1=4.7

n2=16      s2=5.8

And α = 0.05.

The null and alternate hypothesis are

H0: σ₁²=σ₂²       Ha:  σ₁²≠σ₂²

The null hypothesis is  the variability in concentration does not  differ for the two companies.

against the claim

the variability in concentration may differ for the two companies

The critical region F∝(υ1,υ2) = F(0.025)9,15= 3.12

and 1/F∝(υ1,υ2) = 1/3.77= 0.26533

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Test Statistic

F = s₁²/s₂²

F= 4.7²/5.8²=0.6566

Conclusion :

As the calculated F lies in the acceptance region therefore we conclude that there is not sufficient evidence to support the claim that the variability in concentration may differ for the two companies. Hence Ha is rejected and H0 is accepted.

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3 years ago
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X - 10 >= -2

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Answer:

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Step-by-step explanation:

edge21'

good luck, i hope this helps :)

4 0
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