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3 years ago

I don't understand can some one help me plz

Mathematics

2 answers:

vaieri [72.5K]3 years ago

6 0

The answer is 7.76 because the fraction written as a decimal would be 7.76 and not any of the other choices they want you to find which number is equal to the fraction number

Salsk061 [2.6K]3 years ago

4 0

25/125 = 0.76

So 7 + 0.76 = 7.76.

Therefore the answer will be 7.76.

Hope this helps !

Photon

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The graph will show the height of the red car as the time increases, Predict what this graph will look like before pressing star

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Answer:1,4,5

Step-by-step explanation:

I just did it

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3 years ago

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..vertex: (4, -1)<br> f(3) = -6

s344n2d4d5 [400]

Answer:

$\huge\boxed{f(x)=-5(x-4)^2-1=-5x^2+40x-81}$

Step-by-step explanation:

The vertex form of an equation of a parabola:

$f(x)=a(x-h)^2+k$

$(h;\ k)$ - vertex

We have

vertex $(4;\ -1)\to h=4;\ k=-1$

$f(3)=-6$

Therefore we have:

$f(x)=a(x-4)^2+(-1)=a(x-4)^2-1$

Substitute $x=3$ and $f(3)=-6$

$a(3-4)^2-1=-6\qquad|\text{add 1 to both sides}\\\\a(-1)^2=-6+1\\\\a(1)=-5\\\\a=-5$

Finally:

$f(x)=-5(x-4)^2-1=-5(x^2-2(x)(4)+4^2)-1\\\\=-5(x^2-8x+16)-1=-5x^2+(-5)(-8x)+(-5)(16)-1\\\\=-5x^2+40x-80-1=-5x^2+40x-81$

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3 years ago

A square shed has a floor area of 156.25m square. what is the length of the diagonal

Helen [10]

------------------------------------------------------------------
Given Information
------------------------------------------------------------------
Square Area = 156.25m²

------------------------------------------------------------------
Formula
------------------------------------------------------------------
Area = Length x Length

------------------------------------------------------------------
Find Length
------------------------------------------------------------------
156.25 = Length x Length
156.25 = Length²
Length² = 156.25
Length = √156.25
Length = 12.5

------------------------------------------------------------------
Formula
------------------------------------------------------------------
a² + b² = c²

------------------------------------------------------------------
Find Diagonal
------------------------------------------------------------------
12.5² + 12.5² = c²
c² = 156.25 + 156.25
c² = 312.5
c = √312.5
c = 17.68m (nearest hundredth)

------------------------------------------------------------------
Answer: The diagonal length is 17.68m
------------------------------------------------------------------

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4 years ago

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NISA [10]

Answer:

Step-by-step explanation:

I have never heard the term SURDS before, neat.

Multiplying and dividing are easy, you jut multiply/ divide

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Let me know if this did not answer your question.

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Step-by-step explanation:

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4 years ago

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