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Nat2105 [25]
3 years ago
8

Find 2x2 − 2z4 + y2 − x2 + z4 if x = −4, y = 3, and z = 2.

Mathematics
1 answer:
maw [93]3 years ago
3 0
If you put in the substitutions it would be 2*2-(2*2*4)+(3*2)-(-4*2)+(2*4).
Simplified further by multiplying it would be 2*2-8+6--8+8
the negative 8 could be simplified further since the negatives cancel out so you'll have 2*2-8+6+8+8.
Then using the order of operations you would multiply the 2's together first to get 4 so you have 4-8+6+8+8. 
After that it's simple addition giving you an answer of -26.
I'm not sure if you're looking for the final answer or just the equation with substitutions but there's both.

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Five sisters each bought matching scarves and two pairs of socks. The scarves were priced at $12.00. If the total bill for all 5
77julia77 [94]
5x$12=$60 (spent on scarves)
2x5=10 (no of scarves in all)
$125-$60=$65 (total spent on scarves)
$65÷10=$6.50

Ans: $6.50


4 0
3 years ago
What is the value of term a^4?
klasskru [66]

Answer:

<h2>135</h2>

Step-by-step explanation:

\text{We have the recursive formula of a series:}\\\\a_1=5\\a_n=3a_{n-1}\\\\a_2=3a_{2-1}=3a_1\to a_2=3(5)=15\\\\a_3=3a_{3-2}=3a_2\to a_3=3(15)=45\\\\a_4=3a_{4-1}=3a_3\to a_4=3(45)=135

8 0
3 years ago
The half-life of Po-210 is 140 days. If the initial mass of the sample is 5
Nata [24]

Answer:

<h2>0.625kg</h2>

Step-by-step explanation:

an equation can be made given by the detials of the problem

f(n)=5(0.5)^(x/140)

where x is the amount of days

plug in 420 for x to get

0.625

8 0
3 years ago
PLZ HELP ME
True [87]

Answer:

∠ 1 = 20°, ∠ 2 = 160°

Step-by-step explanation:

∠ 1 and ∠ 2 are adjacent angles and are supplementary, that is sum to 180°

x - 12 + 5x = 180 , that is

6x - 12 = 180 ( add 12 to both sides )

6x = 192 ( divide both sides by 6 )

x = 32

Thus

∠ 1 = x - 12 = 32 - 12 = 20°

∠ 2 = 5x = 5 × 32 = 160°

5 0
3 years ago
The ratio of green marbles to red marbles is 3 to 5. If there are 18 green marbles, how many red marbles are there?
maks197457 [2]

Answer:

The are 5 marbles

Step-by-step explanation:

51/85 = 3/5 As a result, there are 51 red and 85 green marbles.

6 0
3 years ago
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