Rob and Amy each improved their yards by planting rose bushes and shrubs. They bought their supplies from the same store. Rob sp
1 answer:
Answer:
The cost of one rose bushes be $10 and the cost of shrubs $4.
Step-by-step explanation
Let us assume that the cost of rose bushes be x .
Let us assume that the cost of shrubs be y .
As given
Rob and Amy each improved their yards by planting rose bushes and shrubs.
They bought their supplies from the same store.
Rob spent $100 on 8 rose bushes and 5 shrubs.
Than the equation
8x + 5y = 100
Amy spent $112 on 8 rose bushes and 8 shrubs.
8x + 8y = 112
Than the two equation
8x + 5y = 100 and 8x + 8y = 112
Subtracting 8x + 5y = 100 from 8x + 8y = 112
8x - 8x + 8y - 5y = 112 - 100
3y = 12
y = $4
Put in the equation 8x + 5y = 100 .
8x + 5 × 4 = 100
8x + 20 = 100
8x = 100 - 20
8x = 80
x = $10
Therefore the cost of one rose bushes be $10 and the cost of shrubs $4.
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Given that a || b, m∠2 = 63° and m∠9 = 105°.
Now, all the angles are as follows:
m∠5= m∠2 = 63° [vertically opposite angle]
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m∠8= 180°-m∠9=180°-105°=75° [Supplementry angles, m∠8+m∠9=180°]
m∠10= m∠8= 180° [vertically opposite angle]
m∠6= m∠8=75° [ Alternate angles]
m∠3= m∠6=75° [vertically opposite angle]
m∠1= 180°-(m∠2+m∠3)=180°-(63°+75°)=42° [as m∠1+m∠2+m∠3=180°]
m∠4= m∠1=42° [vertically opposite angle]
m∠11=m∠4=42° [ Alternate angles]
m∠13= m∠11=42° [vertically opposite angle]
m∠12= 180°-m∠11=180°-42°=138° [as m∠8+m∠9=180°]
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