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Shtirlitz [24]
2 years ago
13

T= 3x +4y work out the value of T when x = 5 and y = -7

Mathematics
1 answer:
strojnjashka [21]2 years ago
6 0

Answer:

T=-13

Step-by-step explanation:

substitute T=3*5+4*(-7)

the product:T=15-28

the sum:T=-13

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Step-by-step explanation:

The basic form of equation:

(x-h)²=4a(y-k),

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(h, k+a) = coordinate of focus

For given parabola:

axis of symmetry: x=2

(h, k) =(2,-3)

(h, k+a)=(2,5)

k+a=5

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a=8(distance from vertex to focus on the axis of symmetry)

equation: (x-2)²=4×8(y+3)

(x-2)²= 32(y+3)

7 0
3 years ago
A tree cast a shadow of 30m long and a 2m stick casts one that is 3m long. As show in the below diagram how tall is the tree?​
PSYCHO15rus [73]

Answer:

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Step-by-step explanation:

<u>We have similar triangles here.</u>

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<u>The ratio of corresponding sides of similar triangles is same:</u>

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6 0
3 years ago
Read 2 more answers
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sergiy2304 [10]

Answer:

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Step-by-step explanation:

The marked angles are "corresponding," hence congruent:

  8x -27 = 7x -4

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5 0
3 years ago
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Alla [95]

Answer: F=40 or other words n=40


Step-by-step explanation:

F= n/4 + 37

F= 12/4 + 37

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Hope this helped! ;)

3 0
3 years ago
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Step-by-step explanation:

6 0
2 years ago
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