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FinnZ [79.3K]
3 years ago
8

3xy - 4y when y =2 and x =5​

Mathematics
2 answers:
Dmitry_Shevchenko [17]3 years ago
8 0
Basically plug in 2 where y is and 5 where X is
3(5)(2) - 4(2) , the parentheses are there to multiply
30-8
22
musickatia [10]3 years ago
8 0

Answer:

22

Step-by-step explanation:

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How do you solve this? x - 2y = 4
valentina_108 [34]
If you want to solve for x, then
add 2y to both sides
x=2y+4
if want to solve for y
minus x both sides and divide by -2
x-2y=4
-2y=-x+4
y=1/2x-2
5 0
2 years ago
Hailey, Megan, and Bailey have saved $458 for a summer trip to the beach. Hailey has saved $167. Megan has saved at least $152,
Jet001 [13]
Let H = Hailey, M = Megan, B = Bailey

H + M + B = 458
167 + M + B = 458
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152 ≤ M ≤ 164
If M = 152, B = 139
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Thus,
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4 0
2 years ago
One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the tea
GenaCL600 [577]

Answer:

3

Step-by-step explanation:

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= 1.833

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Standard deviation = √ 123.67/12

√10.3

=3.21

the change score that is 2.2 standard deviations below the mean.

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= 5.232

5 0
2 years ago
Read 2 more answers
David make 17 dollars in an hour and works 25 hours each week Linda makes 25 dollars in and hour and works 17 hours how much do
MA_775_DIABLO [31]

Answer:

Total earned= $850

Step-by-step explanation:

Giving the following information:

David makes 17 dollars in an hour and works 25 hours each week Linda makes 25 dollars in an hour and works 17 hours.

<u>To calculate the total earned, we need to use the following formula:</u>

Total earned= 17*25 + 25*17

Total earned= $850

8 0
3 years ago
Express the product as a whole number.<br><br> 312×28=
Monica [59]

The answer would be 8736

Hope this helps :)

3 0
2 years ago
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