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JulsSmile [24]
3 years ago
9

Help me pls on these

Mathematics
1 answer:
labwork [276]3 years ago
7 0

Answer:

first one is A) 21

second one is D) 150

Step-by-step explanation:

first one : add all marbles  =  10

there are 3 red

chances of picking a red 3/10 or 30 percent or .3

multiple 70 by .3 and get 21

second one:

A = 6a^{2} (Surface area of cube)

600 = 6a^{2}

a = 10

half of 10 is 5

6(5^{2}) = 150

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What is 14310.912 rounded two decimal places​
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5 0
3 years ago
‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️PLEASE HELP!!! PLEASE EXPLAIN AND ONLY ANSWER IF YOU KNOW YOU HAVE THE CORRECT ANSWE
Lena [83]

We are given the expression x³ - 2y² - 3x³ + z⁴. We have to evaluate it at a given set of x, y, and z values. Before then, let's combine like terms.

x³ - 2y² - 3x³ + z⁴

= -2x³ - 2y² + z⁴ <-- by combining like terms

Now we evaluate for x=3 y=5 z = -3

= -2(3³) - 2(5²) + (-3⁴) <-- by putting in for x, y, z

= -2(27) - 2(25) + 81 <--- parentheses and exponents first in order of operations

= -54 - 50 + 81 <---- multiplication is next

= -4 + 81

= 77


Thus, we evaluate and it's 77.

7 0
4 years ago
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