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lions [1.4K]
3 years ago
8

Evaluate. Use Order of Operations. 2^3 + 4 x 2 - 7 A. 1 B. 9 C. 13 D. 36

Mathematics
1 answer:
horsena [70]3 years ago
8 0

Answer:

B.9

Step-by-step explanation:

Order of Operations:

Exponent, Parenthesis, Multiply/Divide, Add/Subtract

Thus, we do 2^3 first, then 4x2, and finally -7

(8)+(8)-(7)

=9

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The 8 has a value of 8 x ?
kobusy [5.1K]
Im confused on what ur asking but maybe it’s 8
5 0
3 years ago
Please help me fast and show all your work please thx ​
Kitty [74]

If the two diagonals are d and D, the are of the rhombus is

A=\dfrac{dD}{2}

So, in your case, the area is

A=\dfrac{15\cdot 35}{2}=262.5

The other options are wrong because:

  • option A doens't divide by 2, thus getting twice the area of the rhombus
  • option B summed the diagonals instead of multiplying them
  • option D took the difference of the diagonals.
8 0
3 years ago
A cylindrical canister contains three tennis balls. Assume the tennis balls touch the sides of the canister and the top and bott
sweet-ann [11.9K]
Ok, so we know that teh diameters of the 3 tennis balls added up equals the height of the canister

also, since the tennis balls touch the sides, the diameter of the tennis ball=diameter of the base

so what we do is
canister volume-3tennisballvolume=wasted space

normally alot of the equations are using radius so
2.7=diameter
diameter=2r
d/2=r
2.7/2=r
1.35=r

since we are to aprox volume to hundreth. use 3.14=pi

volume of cylinder=hpir^2
volume of sphere (tennis ball)=volume of spere=\frac{4}{3}pir^{3}

first find volume of cylinder

h=3 times diameter of 1 tennis ball=3 times 2.7=8.1
r=1.35
vofcylinder=8.1 times 3.14 times 1.35^2
v=25.434 times1.8225
v=46.353465 (keep as many digits a possible for accuracy)


volume of tennis balls=volume of shpere times 3
v=\frac{4}{3}pir^{3} times 3
and we can see that the 4/3 and the 3 cancel to get 4
v=4pir^{3}
v=4pi1.35^{3}
v=4(3.14)(2.460375)
v=30.90231


so we have
volume of canister=46.353465 in^3
volume of tennis balls=30.90231 in^3
subtract
wasted space=46.353465-30.90231
wasted space=15.451155
round to hundreth
15.45


wasted space=15.45 in^3
8 0
3 years ago
Find the slope of the line that contains (2, 6) and (5, 7).
MrRissso [65]

Answer:

1/3

Step-by-step explanation:

The slope is equivalent to:

(y₂-y₁)/(x₂-x₁)

Now we plug in the coordinates into the equation:

(7-6)/(5-2)=1/3

​

6 0
2 years ago
Which equation has the steepest graph? Answer Choices:
elixir [45]
I think its y=x-9

sorry if im wrong :(
5 0
2 years ago
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