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elena-s [515]
3 years ago
9

5. (04.07)

Mathematics
1 answer:
torisob [31]3 years ago
4 0

Answer:

D) f(x) = 4(3)^x​

Step-by-step explanation:

Plug y in for f(x) and plug in the points so if they are both true in one equation then it is correct.

A)

y = 3(4)^x

36 = 3(4)^2

36 = 3(16)

This is already incorrect

B)

y = 4(3)^-x

36 = 4(3)^-2

36 = 4(1/16)

36 ≠ 1/4

This is incorrect

I'm going to skip C because I believe D is correct:

D)

y = 4(3)^x​

36 = 4(3)^2

36 = 4(9)

36 = 36

Now we plug in the other points

y = 4(3)^x​

12 = 4(3)^1

12 = 4(3)

12 = 12

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X−3(5x−6)=3−10x What is x, and how do you find x?
Fudgin [204]

Answer:

x=3or-1

Step-by-step explanation:

x-3 (5x-6)=3-10x

5x^2-15x-6x+18=3-10x

collect like terms

5x^2+18-3=15x+6x-10x

5x^2+15=11x

5x^2-11x+15=0

factorise

(x-3) (5x+5) =0

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7 0
4 years ago
A container contains a large unspecified number of​ ping-pong balls. A student takes 80 balls from the​ container, marks them wi
SashulF [63]

Answer:

400 ping pong balls

Step-by-step explanation:

Let the total number of ping pong balls =x

Out of x ping pong balls, 80 are marked with a blue dot

Out of 80 ping pong balls, 16 are marked with a blue dot.

Expressing it as a ratio:

x:80=80:16

\frac{x}{80}=\frac{80}{16}\\ 16x=80X80\\x=6400 \div 16\\x=400

There are an estimate of 400 ping pong balls in the container.

5 0
3 years ago
Andrew has a moneybox in which he saves all of his R5,R2 and R1 coins.The coins are in the ratio 2:5:7 respectively.If he has a
Pepsi [2]

Andrew has saved 36 number of R5 coins, 90 number of R2 coins and 126 number of R1 coins.  

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

The coins are in the ratio 2:5:7 respectively. If he has a R90 in R2 coins. If x represent the total coins, hence:

(5/14) * x = 90

x = 252

Number of R5 coins = (2/14) * 252 = 36

Number of R1 coins = (7/14) * 252 = 126

Andrew has saved 36 number of R5 coins, 90 number of R2 coins and 126 number of R1 coins,  

find out more on equation at: brainly.com/question/2972832

4 0
2 years ago
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a_sh-v [17]

Answer:

Pls send the options so I can confirm the answer.

5 0
4 years ago
Choose the number sentence that illustrates the distributive property of multiplication over addition. A. 3 × (4 + 7) = (3 × 4)
Tcecarenko [31]

Answer: A

Step-by-step explanation: though they did phrase it in a very weird way, and I would suggest to you to make sure your formatting of your question is understandable, A demonstrates distributive property. you can imagine this as two little arrows going from the multiplier outside the parentheses, to each number inside them. this property is used a Lot in basic algebra and using variables. basically, instead of adding inside the parentheses first, and then multiplying that answer by the outside number, you just multiply the outside number by each number inside the parentheses Individually. and then follow through with the operation. this can get confusing if subtraction or negatives are involved, but I'm sure you'll figure it out :)

4 0
2 years ago
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