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3 years ago

The sum of two-sevenths of a number and 3 is 9. Can you please write out into an equation>~

Mathematics

2 answers:

Sonbull [250]3 years ago

7 0

Answer:

The equation is: 2/7x + 3 = 9

The unknown number is: 21

Step-by-step explanation:

Write as an unknown value (using a variable)

2/7ths of a number = 2/7x

Write as an equation

2/7x + 3 = 9

Subtract 3 from both sides of the equation

2/7x = 6

Divide both sides of the equation by 2/7

x = 21

The equation is: 2/7x + 3 = 9

The unknown number is: 21

Hope this helps :)

serg [7]3 years ago

4 0

Answer:

2/7x +3=9

x=21

Step-by-step explanation:

Let the unknown be x.

Take 3 to the other side so: 2/7 multiplied by x= 6

Divide 6 by 2/7 to get the answer;

Therefore x=21

Sub back into equation to check answer.

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What else would need to be congruent to show that triangle EFG=~ triangle HIJ by SSS?

Anuta_ua [19.1K]

Answer:

Step-by-step explanation:

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3 years ago

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3 years ago

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makkiz [27]

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3 years ago

Read 2 more answers

Can someone help me

Deffense [45]

Answer:

w = 10 cm

Step-by-step explanation:

The area (A) of the triangle is calculated as

A = $\frac{1}{2}$ base × height

here base = 6 and height = 8, thus

A = 0.5 × 6 × 8 = 3 × 8 = 24 cm²

The area of the rectangle = 5 × 24 = 120 cm²

area of rectangle = lw ( l is length, w is width )

Here l = 12, thus

120 = 12w ( divide both sides by 12 )

w = 10 cm

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3 years ago

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Step-by-step explanation: but thats approximately

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