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natulia [17]
3 years ago
15

1.) 15 — 2y = Зу Help!!!​

Mathematics
1 answer:
Rudiy273 years ago
5 0

Answer:

y=3 the answer is 9 to the equation

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There are 80 students in a speech contest. Yesterday 1/4 of them gave their speeches. Today 2/5 of the remaining students gave t
beks73 [17]
So 80 total
1/4 gave speeches or 20 gave speeches
80-20=60
today 2/5 of 60 gave speeches

2/5 of 5=60 is the same as
2/5 times 60=120/5=24 who gave speeches

60-24=36

36 haven't give their speeches
3 0
3 years ago
Sasha's bank account earns 4% simple interest. How much must she deposit in the account today if she wants it to be worth $1,000
Serhud [2]

If Sasha wants her account to be worth $1,000 in 5 years, then she must deposit $833.34.

<h3>What is simple interest?</h3>

Simple interest is a method of calculating interest on an amount for n period of time with a rate of interest of r. It is calculated with the help of the formula,

SI = PRT

where SI is the simple interest, P is the principal amount, R is the rate of interest, and T is the time period.

Sasha's bank account earns 4% simple interest. Therefore, if she wants it to be worth $1,000 in 5 years then the principal amount must be,

Account balance = PRT + P

$1,000 = P[(0.04×5)+1]

$1,000 = 1.2 P

P = $833.34

Hence, if Sasha wants her account to be worth $1,000 in 5 years, then she must deposit $833.34.

Learn more about Simple Interest:

brainly.com/question/2793278

#SPJ1

5 0
1 year ago
A function is described by the equation f(x) = 2x + 3. The replacement set for the independent variable is (2,4,6,8). Which set
Anna11 [10]
<h3>Answer:  {7, 11, 15, 19}</h3>

Write the values in the order shown. The curly braces indicate a set.

=================================================

Explanation:

The replacement set for the independent variable is {2,4,6,8}

This means we'll plug x = 2, x = 4, x = 6, and x = 8 into the function one at a time to find the corresponding y = f(x) value.

---------

Plug in x = 2 to find that,

f(x) = 2x+3

f(2) = 2*2+3 ... replace every x with 2

f(2) = 4+3

f(2) = 7

If the input is x = 2, then the output is y = 7. Therefore, the '2' in the domain corresponds to '7' in the range.

If you repeat those steps for x = 4, then you should find that f(4) = 11. Do the same thing for x = 6 and it should lead to y = 15. The last value in the range is y = 19 which corresponds to x = 8.

In short, the domain {2,4,6,8} corresponds to the range {7, 11, 15, 19}

Usually with sets, order doesn't matter. However, in this case, the order is important because we need to match the 2 with the 7, the 4 with the 11, etc.

6 0
2 years ago
The population of a city in 2005 was 18,000. By 2010, the city’s population had grown to 45,000. Economists have determined that
SpyIntel [72]
Exponential model is y=Ae^(kt)
Assume initial start is 2005, time = 0, so y = 18000e^(kt)
45000 = 18000*e^(k5)
solve for k, approx 0.1832
y = 18000*e^(1.832) = 112,435, approximately
6 0
3 years ago
5 litres of paint cost 210 work out the cost of 50 L of paint​
krek1111 [17]

Answer:

2100

Step-by-step explanation:

5/210=50/x

x= 50*210 / 5

x= 2100

4 0
2 years ago
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