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2 years ago

I need help on some math (the ones that are circled)

Mathematics

1 answer:

vagabundo [1.1K]2 years ago

4 0

Answer:

Number 7 is 34.56in

Step-by-step explanation:

First: Label each side Ex: Left side:

Top:

Bottom:

etc.

Second: Find the area of each side

Third: add them together

P.S. since this was a perfect cube, you could've also just found the area of 1 side then multiplied by 6:)

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A bag contains white marbles and yellow marbles, 54 in total. The number of white marbles is 6 less than 3 times the number of y

NNADVOKAT [17]

Let x be white marbles, y be yellow marbles
x+y=54…(1)
x=3y - 6 …(2)

put (2) into (1)
(3y - 6) + y = 54
4y = 60
y=15

put y=15 into (1)

x + 15=54
x=39

so y=15 x=39

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3 years ago

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Solve d/14-1/2=1/4 Show your work.

otez555 [7]

I hope this helps you

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2 years ago

30 is 20% of what number?

Nataly [62]

30 is 20% of 150. Hope this pic helps

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3 years ago

It is possible to get 2 solutions when the system of equations is: (check all that apply)

SVETLANKA909090 [29]

Answer:

A system of the equation of a circle and a linear equation

A system of the equation of a parabola and a linear equation

Step-by-step explanation:

Let us verify our answer

A system of the equation of a circle and a linear equation

Let an equation of a circle as $x^2+ y^2 = 1$ ..........(1)

Let a liner equation Y = x ............(2)

substitute (2) in (1)

$x^2 + x^2 = 1\\2x^2 = 1\\$

$x^2 = \frac{1}{\sqrt{2} } \\x = +\frac{1}{\sqrt{2} } , -\frac{1}{\sqrt{2} }$ so Y = $+\frac{1}{\sqrt{2} } , -\frac{1}{\sqrt{2} }$

so the two solution are ( $(\frac{1}{\sqrt{2} } ,\frac{1}{\sqrt{2} }) (-\frac{1}{\sqrt{2} }, -\frac{1}{\sqrt{2} }$ )

A system of the equation of a parabola and a linear equation

Let equation of Parabola be $y^2 = x$

and linear equation y = x

substitute

$x^2 = x\\x^2 - x= 0\\x(x-1) = \\x = 0 , 1$

Y = 0,1

so the two solutions will be (0,0) and (1,1)

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2 years ago

8s + 9 = 7s + 6 <br>s= ?

denis-greek [22]

Answer:

s = -3

Step-by-step explanation:

8s + 9 = 7s + 6

Subtract 7s from each side

8s-7s + 9 = 7s-7s + 6

s+9 = 6

Subtract 9 from each side

s + 9-9 = 6-9

s = -3

7 0

2 years ago

Read 2 more answers