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2 years ago

1 kg of seawater contains, on average, 35 g of salt. How many grams of seawater contains 4.2 g of salt?

Mathematics

1 answer:

Alekssandra [29.7K]2 years ago

7 0

120 g of seawater. If you need the work I can send a picture

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Solve 80% of x = 100 or 0.8x = 100

suter [353]

Answer:

125

Step-by-step explanation:

divide both sides of the equation by 0.8

0.8÷0.8=0.8÷100

any expression divided by 1 is itself

x=100÷0.8

divide the numbers

100÷0.8=125

125 is your answer

7 0

3 years ago

Hep asappppppppppppp

schepotkina [342]

Answer:

(6 , -1)

Step-by-step explanation:

2x+ y = 11 ----------------(I)

y = 11 - 2x --------------------(II)

$\frac{1}{2}x - 5y = 8$

Multiply the whole equation by 2

$2*\frac{1}{2}x -2*5y = 2*8$

x - 10y = 16 --------------------(III)

Substitute y = 11- 2x in equation (III)

x - 10(11 - 2x) = 16

x - 110 + 20x = 16

21x - 110 = 16

21x = 16 +110

21x = 126

x = 126/21

x = 6

Plugin x = 6 in equation (II)

y = 11 - 2*6

y = 11 - 12

y = -1

5 0

2 years ago

1100 students attend Ridgewood Junior High School. 4% of students bring their lunch to school everyday. How many students brough

Triss [41]

Answer:

the answer is 44 students.

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Can somebody help me with this please?

Svetach [21]

Multiply both sides by -4/7
$x = 40 \times ( \frac{ - 4}{7} ) \\ x = \frac{ - 160}{7}$

7 0

2 years ago

1.)

NemiM [27]

Answer:

There are no specified Numbers provided

Step-by-step explanation:

3 0

2 years ago