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3 years ago

IM TIMED HELP PLS , solve the system of equations using substitution method , y = 2x + 8 , y = 4x - 2

Mathematics

2 answers:

sweet-ann [11.9K]3 years ago

6 0

Answer:

x=5, y=18

Step-by-step explanation:

y=2x+8

x= (y-8)/2

Substitute in second equation,

y= 4((y-8)/2) -2

y= 2(y-8)-2

y= 2y-16-2

16+2=2y-y

18=y

Replace y value in first equation to find x,

18= 2x+8

18-8=2x

10=2x

5=x

irina1246 [14]3 years ago

5 0

plz plz mark brainliest if it helps

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abruzzese [7]

Answer:

h = 13.333 +693.333/r

Step-by-step explanation:

For h hours, Brandee's pay will be ...

pay = 40r +(h -40)(1.5r) . . . . 40 hours at rate r + overtime (h-40) hours at 1.5r

pay = 40r +1.5hr -60r . . . . . eliminate parentheses

pay = 1.5hr -20r . . . . . . . . . . collect terms

Solving for h, we have ...

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_____

<em>Additional comments</em>

You need to know r to find the number of hours Brandee worked. She got paid $800 for a presumed 40-hours of regular time, so made r = $20 per hour. The above formula will tell you she worked 48 hours in the pay period.

6 0

3 years ago

Find the sum of the mixed number 4 7/8 + 7 5/8

Fofino [41]

Answer:

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(Decimal: 15.25)

Step-by-step explanation:

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3 years ago

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table?

sveta [45]

Answer: A B

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Step-by-step explanation:

Since we have given that

Number of people of A in group 1 = 15

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Total number of people in group 1 is given by

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Relative frequency of people of A in Group 1 is given by

$\frac{15}{60}=0.25$

Relative frequency of people of B in Group 1 is given by

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Number of people of B in group 2 = 25

Total number of people in group 2 is given by

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Relative frequency of people of A in Group 2 is given by

$\frac{20}{45}=0.44$

Relative frequency of people of B in Group 2 is given by

$\frac{25}{45}=0.56$

Hence, A B

Group 1 0.25 0.75

Group 2 0.44 0.56

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3 years ago

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4 0

3 years ago

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