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Lina20 [59]
2 years ago
12

Part A

Mathematics
1 answer:
telo118 [61]2 years ago
6 0

<em>Answer: </em>

<em>Elena's running speed is 5 miles/hour </em>

<em>Explanation: </em>

<em>The speed is defined as the covered distance per unit time </em>

<em>In the problem, we have: </em>

<em>The distance covered is the length (circumference) of the circular track which is given as  of a mile. </em>

<em>We are also given that she completes each lap (she completes  of a mile) in  of an hour </em>

<em> </em>

<em>To get her speed, we will divide the distance covered by the time taken to cover this distance </em>

<em>This is done as follows: </em>

<em>speed =  miles/hour </em>

<em>This means that: </em>

<em>Elena can run 5 miles each hour</em>

By shesney <3

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250 = 26.95(4) + 0.28m

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We are looking for WHOLE miles though and if he goes even a decimal point over that many miles (and change), he will be over budget. Thus, we must round down to the whole integer. 

Brad can drive 507 miles on a $250 budget for a 4-day rental. 
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Please solve this sheet.
lyudmila [28]
Hello,

A: roots: -1,-3
a point (-2,1)
Vertex=((-2,1)

y=k*(x+1)(x+3) using roots
but k*(-2+1)(-2+3)=1==>k*(-1)*1=1==>k=-1

eq: y=-(x+1)(x+3)
==>y=-(x²+3x+x+3)
==>y=-x²-4x-3
y=k(x+2)²+1 if x=-1,y=0 ==>k*1+1=0==>k=-1
==>y=-(x+2)²+1

Answer :A--> R,K

B)
y=k(x+4)²-2 and k=-1/2
y=-1/2(x+4)²-2
y=-1/2x²-4x-10

answer B--> I,≈W if it is written -1/2*x²  (square has been forgotten)

C:
y=2x²-16x+30
y=2(x-4)²-2
answer : C-->S,J

D:
y=-(x+3)(x+1)
y=-x²-4x-3
=-(x+2)²+1
answer D--> V,L

E:
Here there is a problem: or the graph is wrong, or 2 equations are missing!

y=1(x+1)(x-3) using roots
y=x²-2x-3 ≈ T si it were -2x and not +2x.

y=(x-1)²-4 ≈H is it were -1 in place of +1 [H:y=(x+1)²-4]




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3 years ago
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