Answer - 5
Explanation - answer is not 13...
4 + ___ = 9
So now you should 9 - 4 = 5
so answer is 5.....
I hope you Understand...
Substitute the value of y given by the second equation into the first.
.. 3x -5(-7) = 17
.. 3x +35 = 17
.. 3x = -18
.. x = -6
The solution is (x, y) = (-6, -7).
Answer:
256 sq cm
Step-by-step explanation:
cube is a three-dimensional figure with six congruent square faces. Since each face is congruent, each of the edges have the same length.
The cross-section described is shown below.
The cross-section is also a square which is congruent to the other faces of the cubes. Therefore, the edges of the cross-section will each measure 16 cm. Find the area by using the formula for the area.
A=lw
=(16cm) (16cm)
=256 sq cm
So, the area of the cross-section is 256 sq cm.
hope this helps some wayStep-by-step explanation:
Answer:
$18
Step-by-step explanation:
- I multiply the tax by the pretax price of the meal, and I get 8% * x
- I multiply the tip by the pretax price of the meal, and I get 20% * x
- I make an equation, and make sure to add the original x
- 2/25x + 1/5x + x=23.04
- 32/25x=23.04
- x=18
- Therefore, the pretax price of the meal is $18
Answer:
0.2755
Step-by-step explanation:
We intend to make use of the normal approximation to the binomial distribution.
First we'll check to see if that approximation is applicable.
For p=10% and sample size n = 500, we have ...
pn = 0.10(500) = 50
This value is greater than 5, so the approximation is valid.
__
The mean of the distribution we'll use as a model is ...
µ = p·n = 0.10(500)
µ = 50
The standard deviation for our model is ...
σ = √((1-p)µ) = √(0.9·50) = √45
σ ≈ 6.708204
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A continuity correction can be applied to better approximate the binomial distribution. We want p(t ≤ 9.1%) = p(t ≤ 45.5). For our lookup, we will add 0.5 to this limit, and find p(t ≤ 46).
The attached calculator shows the probability of fewer than 45.5 t's in the sample is about 0.2755.