moowalden1239
25.04.2020 •
Mathematics
This is similar to another problem but read carefully... This is a little more challenging: 2 diamond rings and 4 silver rings cost $1880. A diamond ring and silver ring cost $880. How much does a silver ring cost? How much does a diamond ring cost?
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Ответ:
$820
Step-by-step explanation:
D= Diamond Ring
S= Silver Ring
2D + 4S = 1880
D + S = 880
D = 880 - S
4S + 2(880 - S) = 1880
4S + 1760 - 2S = 1880
2S + 1760 = 1880
2S = 120
S = 60
880 - 60 = 820.
Ответ:
y=-2x+3
Step-by-step explanation:
Slope formula: y=mx+b
m=slope
b=y-intercept