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3 years ago

3 pages in 7 minutes or 8 pages in 14 minutes, which is better

Mathematics

2 answers:

o-na [289]3 years ago

5 0

Answer:

8 pages in 14 minutes

Step-by-step explanation:

if you double the first one it would come out to

6 pages in 14 mintues

then you can tell that 8 pages in 14 mintues is more

Scilla [17]3 years ago

4 0

Answer:

8 pages in 14 minutes.

Step-by-step explanation:

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Write each of these measurements using whole numbers of units.

Reptile [31]

A) 2 m b) 123 km c) 1 L
Hope this helps!

5 0

3 years ago

If r = 7 units and x = 9 units, then what is the volume of the cylinder shown above?

Marianna [84]

Idk if the hight is 9 units but if it is the answer is 1385.44 units cubed.

6 0

3 years ago

2k - 2j when j=4&k=6 replace the variable with the given amount and solve the problem

eimsori [14]

Answer:

Step-by-step explanation:

first, plug in 6 for k. (it doesn't matter which value you plug in first; you can start with j or k, but i'm just starting with k since that is the variable that comes first in the expression)

2k - 2j => 2(6) - 2j

then plug in 4 for j.

2(6) - 2j => 2(6) - 2(4)

now your expression is 2(6) - 2(4). simplify by multiplying 2(6) and then -2(4) (again, it doesn't matter which one you multiply first, as long as you make sure that the minus sign between 2(6) and 2(4) gets attached to the 2 in 2(4).)

2(6) - 2(4) => 12 - 2(4)

12 - 2(4) => 12 - 8

subtract 8 from 12.

12 - 8 = 4

your answer is 4, therefore when j = 4 and k = 6, 2k - 2j = 4.

i hope this helps! have a nice day <3

8 0

3 years ago

The expression sin(23°)cos(7°) + cos(23º)sin(7°) is equivalent to

jeka94

Answer:

$\sin(30)$

Step-by-step explanation:

Given

$\sin(23) \cos(7) + \cos(23) \sin(7)$

Required

An equivalent expression

The above is an illustration of the sine formula which states:

$\sin(A) \cos(B) + \cos(A) \sin(B) = \sin(A + B)$

In this case:

$A = 23\\ B = 7$

So:

$\sin(23) \cos(7) + \cos(23) \sin(7) = \sin(23 + 7)$

$\sin(23) \cos(7) + \cos(23) \sin(7) = \sin(30)$

Hence, an equivalent expression is: $\sin(30)$

8 0

3 years ago

A and b are positive integers. Find <img src="https://tex.z-dn.net/?f=-2a%2B3b" id="TexFormula1" title="-2a+3b" alt="-2a+3b" ali

lord [1]

A could be 2 while B could be 3, so -2a+3b turns into -4+9, which equals 5.

From what I know you can't really solve a a single equation with two-variables so it's just a matter of trial and error.

Just try plugging in a small number like 2 for a just to try it and you get 8b^2=72.

Divide everything by 8 to isolate b and you get that b^2=9.

Square root everything and you'll find that b=3. This is just one possible combination, I'm sure there are many more but this is obviously the one that was intended to be found.

Now that we know that a=2 and b=3 just plug them into the equation.

-2(2)+3(3)=?

-4+9=?

Sorry about having to use this ^ symbol, the equation maker is not working.

7 0

3 years ago