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LiRa [457]
3 years ago
8

DUE BEFORE 5:OO!!!!!!

Mathematics
1 answer:
AleksAgata [21]3 years ago
6 0
X + y = 6
x - 6y = -9

Subtract the equations, you get:

y - (-6y) = 6 - (-9)
7y = 15

y = 15/7

x + 15/7 = 6
x + 15/7 = 42/7
x = (42-15)/7
x = 27/15

None of your answer choices are correct, since the solution to the systems of equation is (27/15, 15/7)
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A solid right pyramid has a square base with an edge length of x cm and a height of y cm. Which expression represents the volume
solniwko [45]

Answer:

Thus, volume of pyramid = \frac{1}{3}x^2y cm³

Step-by-step explanation:

Given: A solid right pyramid has a square base with an edge length of x cm and a height of y cm.

We have to choose from the given options an expression for the volume of the pyramid.

Volume of pyramid = \frac{1}{3}\times Area\ of\ base \times height

Since base is a square with edge length x cm.

Area of square = (side)² = x²

Thus, volume of pyramid = \frac{1}{3}x^2y cm³


3 0
3 years ago
Read 2 more answers
A. In the standard normal and t distributions, the 95% confidence multiplier is equal to the ________ 1-sided critical value.
valkas [14]

Answer:

a. 1.645 multiplier = 5% critical value

b. 95

Step-by-step explanation:

Note that in statistical analysis probability principles are often used. The critical value from the critical region indicates whether the statistician should reject or accept the null hypothesis.

Note that the confidence multiplier is a constant that shows the number of standard deviations in a normal curve; the  deviation standard<em> implies the measure of difference between the observed value of a variable and some another value.</em>

5 0
3 years ago
What is 228/298 simplified to its lowest term?
rosijanka [135]
Find the GCF of 228 and 298 and that would be 2.

divide both the numerator and denominator by 2

simplify

Answer: 114/149.
5 0
3 years ago
For the following system, use the second equation to make a substitution for why in the first equation. Will mark brainlyest!
Alona [7]

Answer:

b

Step-by-step explanation:

get y by itself in the second equation: y= 2x-3

substitute this into the y of the first equation:

2x+2x-3= 5

7 0
3 years ago
Find the first partial derivatives of the function. (sn = x1 + 2x2 + ... + nxn; i = 1, ..., n. give your answer only in terms of
liq [111]

Answer:

  ∂u/∂xi = i·cos(sn)

Step-by-step explanation:

For u = sin(v), the partial derivative of u with respect to xi is ...

  ∂u/∂xi = cos(v)·∂v/xi

In this case, v=sn, and ∂sn/∂xi = i, so the derivatives of interest are ...

  ∂u/∂xi = i·cos(sn)

6 0
3 years ago
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