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Alenkinab [10]
3 years ago
12

Joanne and Betty have a combined age of 60 years. If Joanne is 18 years old, how old is Betty?

Mathematics
2 answers:
denis23 [38]3 years ago
8 0

Answer:

42

Step-by-step explanation:

kirill115 [55]3 years ago
3 0

Answer:

42

Step-by-step explanation:

Let Joanne age be x

let betty age by y

. ° . x + y = 60

if joanne is 18

y = 18

x + 18 = 60

x = 60 - 18

x = 42

. ° . betty = 42

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Given:

A table of values of a linear function.

To find:

The slope, y-intercept and equation of the function.

Solution:

Take any two points on the table.

Let the points are (-1, -3) and (0, -6).

Slope of the line:

$m=\frac{y_2-y_1}{x_2-x_1}

$m=\frac{-6-(-3)}{0-(-1)}

$m=\frac{-6+3}{0+1}

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m = -3

Slope of the function = -3

y-intercept of the function is the point where x = 0.

In the table y = -6 when x = 0

y-intercept = -6

Equation of a line:

y = mx + c

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y = -3x + (-6)

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3 0
3 years ago
Can someone help me with this question please?
Paladinen [302]
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7 0
4 years ago
A 2 pound bottle of barbeque sauce cost $22.08.what is the price per ounce ?
beks73 [17]

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3 0
3 years ago
5x + 2y = 3<br> 2x+3y=-1<br> Solve
professor190 [17]

Answer:

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Step-by-step explanation:

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<u>     +2    +2</u>

5x = 5

<em><u>x = 1</u></em>

2(1) + 3y = -1

2 + 3y = -1

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3 0
3 years ago
Listen
disa [49]

Answer:

A 29 is the answer to the problem

5 0
3 years ago
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