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babymother [125]
3 years ago
14

Squareroot(y-1) + 3 = y

Mathematics
1 answer:
jek_recluse [69]3 years ago
7 0
Note:xy means x times y and x(y) means the same thing

so
first we get rid of square root then
make the equation equal to zero becaues if
xy=0 then x or/and y=0



squareroot(y-1)+3=y

isolate the squareroot
subtrac 3 from boht sides

squareroot(y-1)=y-3

square both sides (since they are equal, you should be able to square both sides and still make it true)

(squareroot(y-1))^2=(y-3)^2
(y-1)=(y-3)(y-3)
y-1=y^2-6y+9
subtrac y from both sides
-1=y^2-7y+9
add 1 to both sides
0=y^2-7y+10
find what two number multiply to make 10 and add to get -7
the answer is -2 and -5

0=(y-5)(y-2)
therfore
y-5=0
and/or
y-2=0

therefor
y=5 or/and 2 might work
let's try out 2
square root(2-1)+3=2
square root(1)+3=2
1+3=2
false
so 2 doesn't work



let's try 5
squareroot(5-1)+3=5
squareroot(4)+3=5
2+3=5
5=5
true

y=5
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Answer:

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8 0
3 years ago
A binomial event has n = 50 trials. The probability of success for each trial is 0.60. Let x be the number of successes of the e
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Step-by-step explanation:

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σ = √(npq) = √(50 × 0.60 × 0.40) = 3.4641

3 0
3 years ago
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What is this property 14-8=2x+8-8<br> 6=2x
Molodets [167]

Answer:

Distributive?

Step-by-step explanation:

The way the problem is laid out confuses me but if it is the problem that you laid out, it should be Distributive.

8 0
3 years ago
Find the missing side. Round your answer to the nearest tenths.<br><br> X=
Lapatulllka [165]

Answer:

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Step-by-step explanation:

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The tangent function definition is

tan α = opposite side/ adjacent side

In our problem

   tan 70° = x/ 6, multiply both sides by 6 to isolate x

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3 0
2 years ago
Can somebody help me ?
nata0808 [166]
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3 years ago
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