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Paha777 [63]
3 years ago
9

Y= 3x - 15 x+y=13 find the solution

Mathematics
2 answers:
Pepsi [2]3 years ago
6 0

Answer:

x+3x-15=13

4x=28

x=7

......

vfiekz [6]3 years ago
5 0

Answer:

y = 3x - 15 \\  \\ to \: find \: x \: substitute \: y \: into \: 0\\  \\ 0 = 3x - 15 \\  - 3x =  - 15 \\ divide \: both \: sides \:by \:  - 3 \\  \\ x = 5

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Enter a range of values for x.<br> 85°<br> 25<br> 5x - 10<br> [ ? ] Enter
Nataly_w [17]
<h3>Answer: 2 < x < 7</h3>

==================================================

Explanation:

We'll use the hinge theorem here. This says (more or less) that the larger an angle is, the side opposite of that will be longer.

Imagine that the segments with the single tickmarks represent a door swinging open/shut. The more open a door is, the further the distance it is from the handle to the frame. In terms of these triangles, the segment 25 is larger than 5x-10 because the angle 90 (opposite the 25) is larger than the angle 85 degrees (opposite the 5x-10)

In symbols we say

5x - 10 < 25

We also say 5x - 10 > 0 or 0 < 5x - 10 to ensure that the segment of length 5x-10 is not 0 or negative.

Put the two inequalities together and we get 0 < 5x - 10 < 25

------------

Solve for x

0 < 5x - 10 < 25

0+10 < 5x - 10 < 25 + 10 .... adding 10 to all sides

10 < 5x < 35

10/5 < 5x/5 < 35/5 ... dividing all sides by 5

2 < x < 7

We have x between 2 and 7, and not equal to either endpoint.

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3 years ago
Find the accumulated value of an investment of $ 20 comma 000 for 4 years at an interest rate of 6.5 % if the money is a. compou
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3 years ago
A money market account is a collection of stock and bonds true or false
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Answer:

A money market fund is a type of mutual fund that invests in high-quality, short-term debt instruments and cash equivalents.

5 0
2 years ago
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4. Are the lines parallel, perpendicular, or neither?
Lelu [443]

Answer:

Perpendicular

Step-by-step explanation:

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3 years ago
Evaluate 3(a + b + c) 2 for a = 2, b = 3, and c = 4.
garri49 [273]

Answer:

54

Step-by-step explanation:

Given:

3(a + b + c) 2

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Add all of the numbers inside the parentheses

3(9)2

Multiply

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3 years ago
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