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Tamiku [17]
4 years ago
10

Two-thirds a number plus 4 is 7.

Mathematics
2 answers:
Scorpion4ik [409]4 years ago
8 0
The variable I am going to us is x. 

2/3x+4=7

That will be your algebraic expression.
Rudiy274 years ago
4 0
2/3 x n + 4 = 7. 

I believe it's this equation.
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Explain how you decide wether to multiply or divide by 3 if you need to convert yards to feet.
Valentin [98]

Answer:

Step-by-step explanation:

Converting yards to feet means that we want the label of yards to cancel, leaving feet as our label. Use the factor-label method taught in chemistry.

???yds *\frac{3feet}{1yd}

The yards label cancels out, leaving feet as our label.  So to answer the question, in order to convert from yards to feet you are multiplying by 3.

6 0
3 years ago
HELP NEEDED PLEASE!
Setler [38]

Answer:

54

Step-by-step explanation:

\frac{4}{3} \pi r^{3} =12\pi \\r=\sqrt[3]{9} \\surface area 4\pi r^{2} = 4\pi (\sqrt[3]{9} )^2=54.372 (3dp)

4 0
3 years ago
Please answer correctly! I will mark you as Brainleist!
timofeeve [1]

Answer:

1047.2 cubic inches

Step-by-step explanation:

V = 4(pi)(r³/3)

V = 4(pi)(125/3)

V = 523.6 cubic inches (1 ball)

V = 2(523.6) = 1047.2 cubic inches (total)

6 0
3 years ago
A regular hexagon is shown.
zhuklara [117]

The central angle of the hexagon is equal to 60º.

Therefore, the trigonometric relationship for the radius is given by:

cos (30) = \frac{a}{c}

Where,

a: apothema of the hexagon

c: Hexagon radius.

Clearing the radio we have:

c = \frac{a}{cos (30)}

Substituting values:

c = \frac{12}{cos (30)}  c = 13.85

Rounding to the nearest whole number we have:

c = 14 in

Answer:

The measure of the radius, c, rounded to the nearest inch is:

C. 14 in.

7 0
3 years ago
Read 2 more answers
Sarah Goes To Dinner With 2 Of Her Friends. The Total Cost Of Dinner Is $61.92 Her Friends Pay 2/3 of the total cost. Exactly Ho
IceJOKER [234]

Answer:

$20.64

Step-by-step explanation:

if you cut 61.92 in to thirds

61.92/ 3= 20.64

so if Sarah's friends payed 2/3 of the bill Sarah herself payed 1/3 which is $20.64

5 0
3 years ago
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