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Alecsey [184]
2 years ago
13

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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A boat travels 105 km downstream in 5 hours. The return trip upstream takes 7 hours. Find the speed of the boat in still water a
notsponge [240]
Speed of the boat = u
speed of the current = v

in downstream,
u - v = 105/5
u - v = 21

in upstream
u + v = 105/7
u + v = 15

add both equations
2u = 36
u = 18

v = -3

so
speed of the boat = 18 km/h
speed of the current = 3 km/h
4 0
2 years ago
Simplify the expression<br> (3x4 + 9x3 – 7x + 15) + (-6X4 – 8x2 + 5x – 3)
elena-s [515]

Answer:

If the numbers next to the "x" are "carroted" ( ^ ) then the answer is

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Step-by-step explanation:

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5 0
2 years ago
Mr. Bernard needs to order more boxes for his 16 inch diameter “Super Pizza.” Use 3.14 to approximate π.
Olegator [25]
Approximately 1.49323
6 0
2 years ago
Evaluate
lora16 [44]

Answer:

8

Step-by-step explanation:

the top part with the variables filled in is 0 + (2x4) + (3x4x2) which is 32

the bottom part would be (3x0) + 4 which is 4

7 0
2 years ago
What is the length of the midsegment of a trapezoid with bases of length 16 and 22
Debora [2.8K]
1/2(16+22)
= 1/2 (38)
= 19
the length if the midsegment is 19







I'm pretty sure...
6 0
3 years ago
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