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zepelin [54]
3 years ago
5

Elena’s aunt bought her a $150 savings bond when she was born. When Elena is 20 years old, the bond will have earned interest an

d increased by 105%. How much will the bond be worth when Elena is 20 years old?
Mathematics
2 answers:
Ghella [55]3 years ago
8 0

Answer:

307.5$

Step-by-step explanation:

150$. 105% of it added.

Since 105% is 1.05, multiply the percentage by the cost to get the money added.

150*1.05=157.5

Then ADD it to the price/savings.

150+157.5=307.5$

vladimir2022 [97]3 years ago
5 0

Here, Elena's aunt bought her a $150 savings bond when she was born.

That is, the initial amount = $150

And, When Elena is 20 year old, the bond will have earned 105% in interest.

Therefore, The bond be worth when Elena is 20 years old,

⇒A= $307.5

Therefore, after 20 years the the bond worth $307.5


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Jane, Scott, and Frank have a total of $144 in their wallets. Frank has 4 times what Jane has. Scott has $6 less than Jane. How
konstantin123 [22]

Answer:

Jane have $25

Frank have $100

Scott have $19

Step-by-step explanation:

To find the amount that each have, we have to represent this information in a mathematical format  and then solve

let x represent represent the amount that Jane has

let Y represent represent the amount that Frank has

let z represent represent the amount that Scott has

From the question given, "Jane, Scott, and Frank have a total of $144"  can be represented mathematically as

x + y + z = $144 ---------------------------------------------------------------------------------(1)

"Frank has 4 times what Jane has"   can be represented mathematically as

y = 4x ---------------------------------------------------------------------------------------------(2)

"Scott has $6 less than Jane"  can be represented mathematically as

z= x- 6 ----------------------------------------------------------------------------------------------(3)

we can now solve the equations using the substitution method

substitute equation (2)  and (3)  into equation (1)

x + y + z = $144

x + 4x + x-6 = $144

6x -6 = $144

add 6 to both-side of the equation

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Divide both-side of the equation by 6

6x/6 = 150/6

x = $25

from equation 2

y = 4x

substitute x= $25 in equation (2)

y = 4 (25)

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substitute x=$25 in equation  (3)

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Frank have $100

Scott have $19

6 0
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Step-by-step explanation:

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7 0
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7 0
3 years ago
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