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Aleks04 [339]
3 years ago
5

Evaluate 5 c - 3 d+11 when c= 7 and d= 8

Mathematics
2 answers:
kotykmax [81]3 years ago
8 0
5x7-3x8+11
35-24+11
11+11
The answer is 22
kumpel [21]3 years ago
6 0
The answer is 11 because you just plug in the numbers for the letter variables and solve 
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Help! William earns $13,644.80 per hear, and has his federal taxes withheld from each weekly check. In addition, a total of $53.
leva [86]
So 52 weeks in a year so

13,644.8/52=262.4 per week

53.8 is deducted from 262.4

so the deduction is 53.8 then the answer is
262.4-53.8=208.6

the 10% and 15% part is of the yearly income and 53.8 is 15% of 262.4 so that part doesn't matter

the answer of net pay is 208.6 dollars
8 0
3 years ago
I need help like RN!!!<br> what are the foci of the ellipse? graph the ellipse. 18x^2+36y^=648
Thepotemich [5.8K]
Hi,

18x^2+36y^2=648\\&#10;&#10;\Rightarrow ( \dfrac{x}{6})^2+( \dfrac{y}{3* \sqrt{2} } )^2=1\\&#10;&#10;a=6,\ b=3* \sqrt{2}\\&#10;&#10;c= \sqrt{a^2-b^2} = \sqrt{36-18} =3* \sqrt{2}\\&#10;&#10;
Center is (0,0)
Foci are (-3√2,0) and (3√2,0)

7 0
3 years ago
Read 2 more answers
Solve the system by substitution.<br> y = –2x + 18<br> y = -4x<br> HURRY PLEASE
Irina-Kira [14]

Answer:

x = -9

Step-by-step explanation:

x = -y/4

y = -2(-y/4) + 18

y = y/2 + 18

y/2 = 18

y = 36

x = -36/4

x = -9

5 0
2 years ago
Perform the indicated operation. 6 - 2i/5 + 3i =
fgiga [73]
I am gonna assume it is C)9/4 - 1/2i
5 0
3 years ago
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Whats balance fe+30^2 &gt;fe^2O^3
blsea [12.9K]

Answer:

You are given:

4Fe+3O_2 -> 2Fe_2O_3

4:Fe:4

6:O_2:6

You actually have the same number of Fe on both sides, The same is true for O_2 so yes this equation is properly balanced.

For added benefit consider the following equation:

CH_4+O_2-> CO_2+2H_2O

ASK: Is this equation balanced? Quick answer: No

ASK: So how do we know and how do we then balance it?

DO: Count the number of each atom type you have on each side of the equation:

1:C:1

4:H:4

2:O:4

As you can see everything is balanced except for O To balance O we can simply add a coefficient of 2 in front of O_2 on the left side which would result in 4 O atoms:

CH_4+color(red)(2)O_2-> CO_2+2H_2O

1:C:1

4:H:4

4:O:4

Everything is now balanced.

Step-by-step explanation:

5 0
2 years ago
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