Please help me! Very desperate

Answers

Answer 1

Answer: Its the second one.
The answer is 256.

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HELP ME YOULL GET 25 POINTS!!!!!!!!
Nine is 4% of what number
A centipede is crawling 6 inches per minute. how long will it take the centipede to travel 1 yard?
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I need help with #2. Can someone help me please?

Sam drew sticks and circles to solve this problem. Explain how he added. Then write the total.

Answers

He would have done 10+10+10 like for each stick then + How ever many ones there were and then we would have done the same for the other set . Soorry if I'm wrong

4t + 2u2 - u3 ; t=2 u=1( I can't input exponents; the second '2' in 2u2 is an exponent, and the '3' in u3 is, too.)

Answers

9, I believe.
4(2)+2(1)^2-(1)^3 (^ just means to the power of "exponent")
8+2-1=9

Estimate the product of 496 and 351

Answers

Take 496 and round it to 500
Take 351 and round it to 350
Your answer should be around 850

Billie’s monthly cell phone bill includes the cost of cell phone service, 15% tax on the cost of the cell phone service, and a $9.25 data fee. Billie’s monthly cell phone bill totals $61.What is the cost of the cell phone service before tax is added?

Answers

It would be $46 because when you add the 15% tax to it, the total is $61.
$61-15%=$46. To check $46+15%=61! Hope i helped! :-)

If xy = 144, x + y = 30, and x > y, what is the value of x – y ?F. 4
G. 6
H. 18
J. 22
K. 24

Answers

$xy=144\nx+y=30\to x=30-y\n\nsubstitute:\n\n(30-y)y=144\n-y^2+30y-144=0\n\n\Delta=30^2-4\cdot(-1)\cdot(-144)=900-576=324;\ \sqrt\Delta=√(324)=18\n\ny_1=(-30-18)/(2\cdot(-1))=(-48)/(-2)=24;\ y_2=(-30+18)/(2\cdot(-1))=(-12)/(-2)=6\n\nx_1=30-24=6;\ x_2=30-6=24\n\nx > y\ to x=24\ and\ y=6\n\nx-y=24-6=18\n\nAnswer:H.$

The library is located 1.8 miles west of Callie’s house. The grocery store is located 2.4 miles south of the library. What is the length of a straight line between Callie’s house and the grocery store?

Answers

Hello!

A good way to solve this is by using the Pythagorean Theorem, where the distance between the grocery store and Callie's house is the hypotenuse of the triangle.

The two legs we are given, 1.8 and 2.4 will represent a and b in the Pythagorean Theorem.

a²+b²=c²

First we have to find 1.8 and 2.4 squared.

1.8²=3.24
2.4²=5.76

If we add these answers, we will get 9. This is c². But to find just c, we will undo the square by using the square root.

√9=3.

This means that the length of a straight line from Callie's house to the grocery store is 3 miles.

I hope this helps!

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