Help with #7 please :) i’ll mark you brainily

Mathematics

2 answers:

TEA [102]2 years ago

8 0

Answer:

x = 11

Step-by-step explanation:

The student didn't divide two on both sides in the step 1. This the mistake that the student made.

The correct solution

2√( 3x + 3 ) = 12

Divide 2 on both sides,

2√( 3x + 3 ) / 2 = 12 / 2

√( 3x + 3 ) = 6

Square on both sides,

[ √( 3x + 3 ) ]² = 6²

3x + 3 = 36

3x = 36 - 3

3x = 33

x = 33 / 3

x = 11

kiruha [24]2 years ago

3 0

Answer:

x=11

Step-by-step explanation:

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The graph below shows the distances, in miles, that a dragonfly can travel in a certain number of hours:

Y_Kistochka [10]

Ur independent variable is ur x values....ur dependent variable is ur y values..so if hrs are on the x axis, then ur independent values are ur hrs (or time)....and ur dependent values are ur distance.

(0,0),(2,50)
slope = (50 - 0) / (2 - 0) = 50/2 = 25

y = mx + b
slope(m) = 25
and since u have point (0,0), ur y int (b) = 0
so ur equation is y = 25x + 0 which is written as y = 25x...which is basically saying that he travels 25 miles per hr

how far will he travel in 24 hrs.....so sub in 24 for x
y = 25(24)
y = 600 miles

in summary : The dependent variable is distance, the equation is y = 25x and the dragonfly will fly 600 miles.

8 0

2 years ago

Read 2 more answers

Find the minimum value of the function f(x) = 2x2 – 17.3x + 32 to the nearest hundredth.

Klio2033 [76]

Answer:

5600.014

= 5000 + 600 + 0.010 + 0.004

i am a mathematics teacher. if anything to ask please pm me

Step-by-step explanation:

5 0

2 years ago