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dsp73
3 years ago
6

Help!! ASAP PLEASE!!!

Mathematics
1 answer:
vladimir2022 [97]3 years ago
7 0

Step-by-step explanation:

from (2)

x-y=2

y=x-2 (3)

subs (3) into (1)

x²-2x+(x-2)=8

x²-2x+X-10=0

x²+x-10=0

quadratic formula

x= (-1±√1²-4×1×(-10))/2(1)

X=( -1±√41)/2

X=(-1+√41)/2

=

x=(-1-√41)/2

=

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On Martin's first stroke, his golf ball traveled 4/5 of the distance to the hole. On his second stroke, the ball traveled 79 met
Sav [38]

Answer:

0.395 kilometre

Step-by-step explanation:

Given:

On Martin's first stroke, his golf ball traveled 4/5 of the distance to the hole.

On his second stroke, the ball traveled 79 meters and went into the hole.

<u>Question asked:</u>

How many kilometres from the hole was Martin when he started?

<u>Solution:</u>

Let distance from Martin starting point to the hole in meters = x

On Martin's first stroke, ball traveled = \frac{4}{5} \ of \ total \ distance\ to\ the\ hole

                                                             =\frac{4}{5} \times x=\frac{4x}{5}

On his second stroke, the ball traveled and went to the hole = 79 meters

Total distance from starting point to the hole = Ball traveled from first stroke + Ball traveled from second stroke

x=\frac{4x}{5} +79\\ \\ Subtracting\ both\ sides\ by \ \frac{4x}{5}\\ \\ x- \frac{4x}{5}= \frac{4x}{5}- \frac{4x}{5}+79\\ \\ \frac{5x-4x}{5} =79\\ \\ By \ cross\ multiplication\\ \\ x=79\times5\\ \\ x=395\ meters

Now, convert it into kilometre:

1000 meter = 1 km

1 meter = \frac{1}{1000}

395 meters = \frac{1}{1000}\times395=0.395\ kilometre

Thus, there are 0.395 kilometre distance from Martin starting point to the hole.

8 0
3 years ago
Y=7/x, x≠0 need the graph answer!!
Nuetrik [128]

Answer:

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Step-by-step explanation:

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3 years ago
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Put fractions in order from greatest to least <br> 5/6 2/4 1/3 7/12
Drupady [299]

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Step-by-step explanation:

3 0
3 years ago
A student receives his grade report from a local community college, but the GPA is smudged. He took the following classes: a 2 h
Olin [163]

Answer:

  • C. 3.0

Step-by-step explanation:

<u>Lets calculate the points:</u>

  • Art - 2 hrs - B (3)                ⇒ 2*3 = 6 points
  • History - 3 hrs - A (4)         ⇒ 3*4 = 12 points
  • Science - 4 hrs - C (2)       ⇒ 4*2 = 8 points
  • Math - 3 hrs - B (3)            ⇒ 3*3 = 9 points
  • Lab - 1 hr - A (4)                 ⇒ 1*4 = 4 points

<u>Totals</u>

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<u>GPA = total points/ total hours</u>

  • GPA = 39/13 = 3.0

Correct option is C

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3 years ago
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