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Arisa [49]
3 years ago
7

Ciara buys 7 lb of strawberries for $5.81. How much would she spend if she wanted 15 lb of strawberries?

Mathematics
2 answers:
wlad13 [49]3 years ago
8 0

by multiplication of 15 and 5.81 answer is the

87.15

krok68 [10]3 years ago
5 0

Answer:

i got 0.125

Step-by-step explanation:

I know you have to divide 5.81 by 7 to find the unit then divide that by 15

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Is 2 a solution of 4z + 12 = 4? Complete the statement.​
hodyreva [135]

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Step-by-step explanation:

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50 POINTS! :D
Alexxandr [17]

Answer:

The speed of the first car is 60 mph

Step-by-step explanation:

speed = distance/time

Solve the above equation for distance to get

distance = speed * time

or simply

d = st

Now we use this formula for distance to write an equation for each car.

Let s = speed of second car

Then since the speed of the first car is 10 mph faster, the first car's speed is s + 10.

The time the two cars traveled is equal but unknown, so let the time = t.

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d = st

120 = (s + 10)t    

(s + 10)t = 120      Equation 1

Second car: speed = s; time = t; 100 miles

d = st

100 = st

st = 100       Equation 2

Equations 1 and 2 form a system of 2 equations in 2 unknowns.

(s + 10)t = 120

st = 100

Distribute t in the first equation.

st + 10t = 120

From the second equation we know st = 100, so substitute 100 for st.

100 + 10t = 120

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Equation 2:

st = 100

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s * 2 = 100

s = 50

The speed of the second car was 50 mph.

The speed of the first car is s + 10.

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Answer: The speed of the first car is 60 mph

8 0
3 years ago
Can somebody please give me a detailed answer
Serjik [45]
Lets go ahead and calculate the area of each side; added together, this will give us the full surface area. First the base, which is 9 by 9 and a square. This means its area is 9*9, which equals 81. Next the triangles, which are all the same, so we only have to do it once and then add it 4 times at the end. The area of a triangle is (1/2)bh, so (1/2)(9)(7) = 31.5.

Finally, we just need to add the areas up.
81 + 31.5 + 31.5 + 31.5 + 31.5 = 81 + 4(31.5)
81 + 126 = 207 units^2
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