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Papessa [141]
3 years ago
7

1. Is 5(x+1) the same as 5x+1? Explain your

Mathematics
1 answer:
tatiyna3 years ago
5 0

Answer:

Step-by-step explanation:

5(x+1), when expanded, becomes 5x + 5, which is ot the same as 5x + 1.

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Consider the following system of equations:
IrinaK [193]

Answer:

x = 6 ; y = -9

Step-by-step explanation:

8 x + 2 y = 30  ..........equ No 1

7 x + 2 y = 24......... equ No 2

8 x = 30 - 2y

∴ x =\frac{ 30 - 2 y}{8}

substituting the value of x in equ No 2

7 \frac{30 - 2 y}{8} + 2 y = 24

7 ( 30 -2 y) + 2 y × 8 = 24 × 8

7 × 30 - 14 y + 16 y = 192

210 + 2 y = 192

2 y = 192 - 210

2 y = - 18

∴ y = - 9

put y = -9 , 8 x = 30 - 2 y

        8 x = 30 - 2 ( -9)

    8 x = 30 - ( -18)

  8 x = 48

∴ x = 6

x = 6 ; y = -9

3 0
3 years ago
What is the formula for pie
Amanda [17]

Answer:

3.14

Step-by-step explanation:

8 0
3 years ago
X^2 -50x+456=0 solve this algebraiclly find x
bagirrra123 [75]

Answer:

x=-406

Step-by-step explanation:

x^2-50x+456=0

x^2-50x=-456

This is because we subtract 456 from each side.

x-50=-456

We then divide the whole equation by <em>x</em> .

x=-406

Adding 50 to both sides gives us <em>x</em> by itself, hope this helps :D

8 0
2 years ago
Read 2 more answers
The heights (in cm) and arm spans (in cm) of 31 students were measured. The association between x(height) and y(arm span) is sho
abruzzese [7]

Answer:

27.385 cm longer would we expect Mike's arm span to be than George's.

Step-by-step explanation:

We have to find how many centimeters longer would we expect Mike's arm span to be than George's using the equation:

y= 4.5x + 0.977 x

where y= arm span

and x= height

Given:

Mike's height=x = 175 cm

so Mike's arm span= y= 4.5 x + 0.977 x

                                    = 4.5* (175) + 0.977* (175)

                                    = 787.5 + 170.975

                                    = 958.475 cm

George's height = x = 170 cm

so George's arm span= y= 4.5 x + 0.977 x

                                    = 4.5* (170) + 0.977* (170)

                                    = 765 + 166.09

                                    = 931.09 cm

Mike's arm span longer than George's = Mike's arm span - George's arm span

                                                                 = 958.475 - 931.09

                                                                 = 27.385 cm.

8 0
3 years ago
HELPPP WILL MARK BRAINLYIST IF RIGHT
Bingel [31]

Answer:

550.92

Step-by-step explanation:

plz mark brainliest even if im wrong, i really need this, and if im wrong tell me im wrong so I cant correct it

7 0
2 years ago
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