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k0ka [10]
2 years ago
9

Solve the simultaneous equations 2x-y=7 3x+5y=4

Mathematics
1 answer:
irinina [24]2 years ago
6 0

Answer:

the answer is x= 3 and y= -1

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Kairi spent $40.18 on CDs. Each CD cost the same amount. The sale tax was$2.33. Kairi also used a coupon for $1.00 off his purch
Arte-miy333 [17]

Therefore the cost of each CD is =$2.30

Step-by-step explanation:

Given , Kairi spent $40 .18 no CDs. The sale tax was $2.33.Kairi also used a coupon for $1.00 0ff his purchase.

Total cost price of The CDs is = $(40+2.33-1.00)

                                                =$41.33

Therefore the cost of each CD is =$(41.33÷18)

                                                       =$2.30

8 0
3 years ago
Explain how you decide wether to multiply or divide by 3 if you need to convert yards to feet.
Valentin [98]

Answer:

Step-by-step explanation:

Converting yards to feet means that we want the label of yards to cancel, leaving feet as our label. Use the factor-label method taught in chemistry.

???yds *\frac{3feet}{1yd}

The yards label cancels out, leaving feet as our label.  So to answer the question, in order to convert from yards to feet you are multiplying by 3.

6 0
3 years ago
What is the volume a circular spray tank if it has a diameter of 5 feet and height of 7 feet
Sedbober [7]
V=hpir^2
d/2=r
5/2/2.5

h=7
V=7pi2.5^2
v=7pi6.25
V=43.75pi
aprox pi=3.141592
V=137.44465


V=43.75pi ft^3 or aprox 137.44465 ft^3

7 0
3 years ago
In a school with 300 students, a random sample of 40 students who were asked to pick a favorite sport showed that 24 students li
Tresset [83]
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6 0
2 years ago
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Claire estimates the her brother is 4 feet tall. When they get measured at the doctor's office her brother's height is 4 feet 2
jasenka [17]

Answer: 2 is less than 5 so when she rounded she ended up with 4 feet and the doctors didn’t round

Step-by-step explanation:

I think this is correct

6 0
2 years ago
Read 2 more answers
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