45 points! i need help with 1-3

Mathematics

1 answer:

Advocard [28]3 years ago

6 0

To answer the 1 and 2 just put 0 on the variable other than the intercept you are looking for, if your looking for X, then Y = 0 so...

(Option D)1. -10x+5y=40
intercept on X
-10x + 5(0)=40
-10x=40 (divide by -10 to take x alone)
x= -4

intercept on Y
-10(0)+5y=40
5y=40 (divide by 5)
y=8

(Option D) 2. same procedure

int. X

5x +4y =80
5x + 4(0) = 80
x = 16

int y.
5(0) + 4y = 80
y = 20

3. just put in standard mode
y= (1/6)x + 4 (multiply by 6 so you have dont have fractions)

6y= x+ 24 (move x to the other side)

-x + 6y = 24

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I thought this was much more easier for you! :)

monitta

Problem 1)

The base of the exponential is 12 which is also the base of the log as well. The only answer choice that has this is choice B.

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Problem 2)

log(x) + log(y) - 2log(z)
log(x) + log(y) - log(z^2)
log(x*y) - log(z^2)
log[(x*y)/(z^2)]

Answer is choice D

======================================================================
Problem 3)

log[21/(x^2)]
log(21) - log(x^2)
log(21) - 2*log(x)

This matches with choice B

======================================================================
Problem 4)

Ln(63) = Ln(z) + Ln(7)
Ln(63)-Ln(7) = Ln(z)
Ln(63/7) = Ln(z)
Ln(9) = Ln(z)
z = 9

======================================================================
Problem 5)

Ln(5x-3) = 2
5x-3 = e^2
5x = e^2+3
x = (e^2+3)/5

This means choice A is the answer

4 0

3 years ago

The rational number<br>number ———————<br>is equal to its negative

Zarrin [17]

Zero is equal to its negative

3 0

3 years ago

Math 1125 – Unit 1 ~ Gunkelman Practice for Section 1.5 The Basics of Graphing Prep Skills The table represents the Seven Summit

marta [7]

According to the table, the highest mountain in Africa is Mt. Kilimanjaro with 19,340 feet in height. The highest mountain in Antarctica is Vinson Massif with 16,864 feet in height.

Then, we subtract

$19,340-16,864=2,476$ <h2>The difference between the heights of the highest mountain in Africa and the highest mountain in Antarctica is 2,476 feet.</h2>