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natka813 [3]
2 years ago
10

Suppose y varies directly with x where y=21 when x=7 find y when x = 15

Mathematics
1 answer:
Romashka [77]2 years ago
3 0
Golfkrieg ist die ganze Woche im Auto oder ist das 56357
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What is the value of log5 125?
zhenek [66]

\rm log_{5}(125)  \\  \rm log_{5}( {5}^{3} )  \\  \rm1 \cdot3 \\ 3 \\  \therefore \tt log_{5}(125)  = 3

6 0
1 year ago
Are these functions?
OlgaM077 [116]

Answer:

Relation 1 : Not a function

R2 : Function

R3: Function

R4: Not a function

7 0
3 years ago
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A $950 deposit for 18 years compounded at<br> an annual interest rate of 2.21%
pantera1 [17]

Answer: 1408.01$

Step-by-step explanation: Use the compound interest formula P*(1+r)^n Where P is the initial value, r is the interest rate, and n is the number of periods

7 0
3 years ago
Your grandparents invested $2,000 for you on the day you were born. How much will this investment be worth on your 25th birthday
algol [13]

We know that, Amount in Compound interest is given by :

\bigstar \ \ \boxed{\sf{Amount = Principal\bigg(1 + \dfrac{Rate \ of \ Interest}{100}\bigg)^{Time \ Period}}}

Given : Principal = $2000

Given : Annual yield is 5% and the interest is compounded quarterly

It means : Interest is compounded 4 times in a year

\implies \sf{Rate \ of \ Interest = \dfrac{R}{4} = \dfrac{5}{4}}

\sf{\implies Time \ period = (25 \times 4) = 100}

Substituting all the values in the formula, we get :

\implies \sf{Amount = 2000\bigg(1 + \dfrac{\dfrac{5}{4}}{100}\bigg)^{100}}

\implies \sf{Amount = 2000\bigg(1 + \dfrac{5}{400}\bigg)^{100}}

\implies \sf{Amount = 2000\bigg(1 + \dfrac{1}{80}\bigg)^{100}}

\implies \sf{Amount = 2000\bigg(\dfrac{81}{80}\bigg)^{100}}

\implies \sf{Amount = 2000 \times (1.0125)^{100}}

\implies \sf{Amount = 2000 \times 3.463}}

\implies \sf{Amount = 6926.8}

8 0
3 years ago
Help with these questions ​
love history [14]

Answer: a) -27, b) 35, c) 14

Step-by-step explanation:

a) When a positive number is multiplied by a negative number, your answer is negative, and since we know that 9 × 3 = 27, and that this figure has to be negative (since 9 is negative), the answer is -27.

b) Multiplying two negative numbers gives a positive number, and since 7 × 5 = 35, the answer is positive 35 (as both 7 and 5 in the original question are negative).

c) Follows just like b.

8 0
3 years ago
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