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Tju [1.3M]
3 years ago
12

NEED NOW!!!

Mathematics
2 answers:
Temka [501]3 years ago
5 0

Answer:

The first one: y - 2 = -5(x - 2)

Step-by-step explanation:

larisa [96]3 years ago
4 0

Answer:

the function y – 2 = –5(x – 2) is linear.

Step-by-step explanation:

We need to find the correct option from provided options which represents a linear function

Since, the linear equation is in the form of <u>y=mx+c </u>where m is slope of line.

In first part y – 2 = –5(x – 2)

Simplify, the function

y -2 = -5x + 10

Add both the sides by 2, in above equation

y = -5x +12

This function is in the form of y=mx+c

so, this is a linear function

In second part x + 7 = –4(x + 8)

Simplify, the function

x+7= -4x+32

subtract both the sides by 7, in above expression

x= -4x+32-7

x= -4x+25

add both the sides by 4x,

x +4x= 25

5x= 25

divide both the sides by 5,

x =5

This is not in the form of y=mx+c

so, this is not a linear function

In third part y – 3 = y(x + 4)

Simplify, the function

y-3= yx+4y

add both the sides by 3,

y= yx+4y+3

This is not in the form of y=mx+c

so, this is not a linear function

In fourth part y + 9 = x(x - 1)

Simplify, the function

y+9= x^{2}-x

subtract both the sides by 9,

y= x^{2}-x-9

This is not in the form of y=mx+c

so, this is not a linear function

Therefore, the function y – 2 = –5(x – 2) is linear.

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Paul has 2/3 as many postcards as Shawn. The number of postcards Shawn has is 4/5 of the number of postcards Tim has. If the thr
ahrayia [7]

Tim has 56 more postcards than Paul.

Step-by-step explanation:

Total postcards boys have = 280

Let,

x = Paul's postcards

y = Shawn's postcards

z = Tim's postcards

According to given statement;

x + y + z = 280      Eqn 1

x=\frac{2}{3}y                   Eqn 2

y = \frac{4}{5}z                   Eqn 3

Putting value of y from Eqn 3 in Eqn 2

x=\frac{2}{3}*\frac{4}{5}z\\\\x=\frac{8}{15}z            Eqn 4

Putting value of x and y from Eqn 4 and Eqn 3 in Eqn 1

\frac{8}{15}z+\frac{4}{5}z+z=280\\\\\frac{8z+12z+15z}{15}=280\\\\\frac{35z}{15}=280\\\\

Multiplying both sides by \frac{15}{35}

\frac{15}{35}*\frac{35}{15}z=280*\frac{15}{35}\\z=120

Putting z=120 in Eqn 3

y=\frac{4}{5}*120\\y=96

Putting y=96 in Eqn 2

x=\frac{2}{3}*96\\x=64

Difference of Tim and Paul = 120-64 = 56

Tim has 56 more postcards than Paul.

Keywords: linear equation, substitution method

Learn more about substitution method at:

  • brainly.com/question/10557938
  • brainly.com/question/10600222

#LearnwithBrainly

7 0
3 years ago
Need help with this one, please be sure to show work, thank you!​
Korolek [52]

Answer:

see explanation

Step-by-step explanation:

the translation (x, y) → (x - 4, y + 7)

means subtract 4 from the x-coordinate and add 7 to the y-coordinate of the original coordinate points

R(0, - 4 ) → R'(0 - 4, - 4 + 7 ) → R'(- 4, 3 )

S(- 2, - 1 ) → S'(- 2 - 4, - 1 + 7 ) → S'(- 6, 6 )

T(- 6, 1 ) → T'(- 6 - 4, 1 + 7 ) → T'(- 10, 8 )


5 0
3 years ago
3) (-14.2b - 97.35) + (10.9b + 12.53 + 3.5x)
sp2606 [1]

Answer : -3.3b + 3.5x - 84.82

(-14.2b - 97.35) + (10.9b + 12.53 + 3.5x)

= (-14.2b + 10.9b) + (3.5x) + (-97.35+12.53)  |||  COMBINE LIKE TERMS

= -3.3b + 3.5x - 84.82

5 0
3 years ago
Read 2 more answers
Ruby is decorating for a party and needs 120 meters of ribbon. At the party supply store, the ribbon is sold in rolls. Each roll
Rufina [12.5K]

Answer:

She will need to purchase 16 rolls of ribbon

Step-by-step explanation:

Step 1: Express the total length of ribbon

Use the expression below;

T=R×N

where;

T=total length of ribbon Ruby has

R=length per roll

N=number of rolls

In our case;

T=120 meters, but since 1 meter=3.28084 feet

T=(120×3.28084)=393.7008 feet

R=25 feet

N=n

replacing;

393.7008 =25×n

n=393.7008/25

n=15.748 rounded up=16

She will need to purchase 16 rolls of ribbon

6 0
3 years ago
Emergency workers in a small city estimate that in he event of a hurricane they would need to transport3,250 people out of the c
harkovskaia [24]

Answer:

68 buses

Step-by-step explanation:

3250÷48=67.7083333333

round off 67.7083333333 so we will get 68

6 0
3 years ago
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