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Klio2033 [76]
2 years ago
5

Which of the following is evaluating to 3(y+4)-7?

Mathematics
1 answer:
boyakko [2]2 years ago
3 0
I hope that i helped ;D

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2.What solid figure is described by a water hose?
expeople1 [14]

Answer:

cylinder <3

Step-by-step explanation:

5 0
3 years ago
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6. The perimeter of a parallelogram is 100 meters. The width of the parallelogram is 4 meters less than its length. Find the len
Ierofanga [76]

Answer:

x = 23, and y = 27.

Step-by-step explanation:

Lets say,

x = width

y = length

this means,

x(2) + y(2) = 100

It also says that the width is 4 meters less than the length.

if we put that into equation form it would look like this,

y - 4 = x

using these 2 equations, we can use the subustusion method to find the x.

x(2) + y(2) = 100

turns in to this :

step 1.     (y - 4) (2) + y(2) = 100 - given

step 2.      2y -8 + 2y = 100 -  distribute

step 3.      4y -8 = 100 - Combine like terms

step 4.       4y  = 108 - Get rid of the 8

step 5        4y/4  = 108 /4 - divide

step 6 .          y = 27

So if y is 27, then

x(2)  +  27(2) = 100

x(2) + 54 = 100

100 - 54 = 46, so x(2) is 46, but to get x, we need to divide 46 by 2, since x multiplied by 2 equals 46.

46  / 2 = 23 = x

so x = 23, and y = 27.

and the rule that y - 4 = x still applies, since 27 - 4 = 23.

I hope this wasn't confusing! It did take a long time tho.

5 0
3 years ago
Write square root of 64 - square root of -289 as a complex number in the form of a+bi
stellarik [79]

Answer:

\sqrt{64}-\sqrt{-289}

=8-17i

Step-by-step explanation:

\sqrt{64}=8 because 8(8)=64 and 8 is the positive square root of 64.

\sqrt{-289}=17i because 17i(17i)=289i^2=-289(-1)=-289.

\sqrt{64}-\sqrt{-289}

8-17i

8 0
3 years ago
Work out the following, giving your answers in their simplest form: 7 divide by 2/3
belka [17]

Answer:

21/2 so 10.5.

Step-by-step explanation:

7÷2/3=21/2=10.5

hope this helps you

3 0
2 years ago
Read 2 more answers
Which equation can be used to find how much of a 50 g sample of nitrogen-16 is left after 7 minutes?
miv72 [106K]

Answer:

Step-by-step explanation:

50(0.5) square 50

8 0
3 years ago
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