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lara [203]
3 years ago
10

Pls help me! (more info in photo)

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
8 0

Answer:

x+ 3/2y= 15

Step-by-step explanation:

8x+12y=120

To put the equation into standard form, the leading coefficient has to be 1. So, divide the whole equation by 8.

x+ 3/2y= 15

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Find sin x/2, cos x/2, and tan x/2, if cos x = -12/13, 180 degrees is less than x which is less than 270 degrees
Rashid [163]
Cos x = -12/13
sin x = -sqrt(13^2 - 12^2) / 13 = -5/13
tan x = 5/12

tan x/2 = (1 - cos x) / sin x = 1 - (-12/13) / -5/13 = 25/13 * -13/5 = -5

2sin^2 x/2 = 1 - cos x = 1 - (-12/13) = 25/13
sin^2 x/2 = 25/13 / 2 = 25/26
sin x/2 = 5/√26

sin x/2 / cos x/2 = tan x/2
cos x/2 = sin x/2 / tan x/2 = 5/√26 / -5 = -1/√26

sin x/2 = 5/√26
cos x/2 = -1/√26
tan x/2 = -5
5 0
3 years ago
A lender uses a credit report to ____
Keith_Richards [23]
<span>A lender uses a credit report to decide whether or not to lend you money based on your creditworthiness. </span><span />
7 0
3 years ago
Read 2 more answers
Classify the relationship represented in each scatter plot as linear, quadratic or exponential.
vesna_86 [32]

Answer:

1. quadratic

2. quadratic

3. linear

4. quadratic

Step-by-step explanation:

In the picture attached, the scatter plots are shown.

The differences between these correlations are:

  • linear : makes a  straight line
  • quadratic: makes a ∩ or ∪
  • exponential: rises or falls  quickly in one  direction

In plot 1, 2 and 4, we can see that y-values decrease at first and then they increase. This is a feature of quadratic correlation

In plot 3, we can see that y-values increase uniformly as x-values increase.This is a feature of linear correlation

7 0
3 years ago
Find the surface area of a square based pyramid if the edge of the base is 8 inches and the slant height is 20 inches.
Sliva [168]

Answer:

384 Square Inches

Step-by-step explanation:

Given a square pyramid with base side edge and slant height

\text{Surface Area} = A+\dfrac12 ps, where:\\A=$Area of Base\\p=Perimeter of base\\s=Slant Height

In the given pyramid:

  • Slant Height=20 inches
  • Base Edge = 8 Inches

Therefore:

Area of Base, A =8 X 8 =64 Square Inches

Perimeter of base, p =4 X 8 =32 Inches

\text{Surface Area} = 64+\dfrac12 *32*20\\=64+320\\=384$ Square Inches

7 0
4 years ago
How do you raw a visual model of 25 divided by 4<br> please show picture<br> thank you!
Harman [31]
I drew 20 tiles and divided them into 4 groups of 5

8 0
4 years ago
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