3 years ago

Asap please help easy

Mathematics

1 answer:

loris [4]3 years ago

3 0

Answer:

C) 32

Step-by-step explanation:

$4^{\frac{5}{2} = \sqrt{4^{5}} = \sqrt{4*4*4*4*4} = 4*4\sqrt{4} = 4*4*2=32$

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The 8th and 20th terms of an arithmetic sequence are 20 and 56 respectively. What is the 1st term of the sequence.

Ostrovityanka [42]

Answer:

Step-by-step explanation:

$a_n=a_1+d(n-1)\\\\a_8=a_1+d\cdot7\\\\a_{20}=a_1+d\cdot19\\\\a_{20}-a_8=a_1+19d-(a_1+7d)=12d\\\\56-20=2d\\\\12d=36\\\\d=3\\\\\\ a_1+3\cdot7=20\\\\a_1=20-21=-1$

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3 years ago

Dave wants to buy a bike for $180. He has $40. Dave mows lawns for $10 per lawn.

LenaWriter [7]

Answer:

180 = 40 + 10x

Step-by-step explanation:

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3 years ago

Sophia uses 18 beads to make a necklace. Three sixths of the beads are purple. How many beads are purple?

joja [24]

Answer:

9 beads are purple

Step-by-step explanation:

we know that

To find out how many beads are purple, multiply the total beads by the fraction of the beads that are purple

$18(\frac{3}{6})=9\ beads$

therefore

9 beads are purple

Another way to solve the problem is convert the fraction in percentage

we have

$\frac{3}{6}=\frac{1}{2}=0.50*100=50\%$

If the total are 18 beads

50% is 9 beads

therefore

9 beads are purple

8 0

3 years ago

Which statements accurately describe the function f(x) = 3(18)*? Select three options.

Yanka [14]

Answer:

Step-by-step explanation:

Without the variable x, your "f(x) = 3(18)*" is not a function. If you meant

f(x) = 3(18)^x, then the domain is "the set of all real numbers," and the range is (0, infinity).

the initial value is 3: f(0) = 3(18)^0 = 3(1) = 3

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3 years ago

Binks needs to raise at least $3600. He was given $200 and plans to save $50 a week. Select all of the inequalities that represe

kherson [118]

Answer:

I'm pretty sure it is 50n+200 <u><</u> 3600

Step-by-step explanation:

Im to fully sure tho

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3 years ago