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Viefleur [7K]
3 years ago
13

Given (3x + 2) : (x - 2) = 7:5, what is thevalue of x?​

Mathematics
1 answer:
nikklg [1K]3 years ago
5 0

Answer:

(3x+2)/(x-2)=7/5

5(3x+2)=7(x-2)

15x+10=7x-14

15x-7x=-14-10

8x=-24

X=-24/8

X=-3

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John has four more nickels than dimes in his pocket, for a total of $1.25. Which equation could be used to determine the numbet
ahrayia [7]
So, you have to have your equation in terms of dimes. What you said about what he has: four more nickels than dimes in his pocket. Will help with our equation.
We know what a nickel and dime is worth. A nickel is .05 and a dime is .1
We don't know how many dimes are in his pocket, since we're trying to solve it.
.1x+(4+x).05=1.25; 
In the parenthesis, it shows how there are four more nickels. Let's solve it now.
.1x + (4+x).05=1.25
.1x + .2+ .05x = 1.25; Let's add like terms.
.15x + .2 = 1.25; Subtract .2 from both sides.
.15x= 1.05
1.05÷.15= 7 =x
There are 7 dimes in his pocket, let's check our answer.
We now know there are 11 nickels, since there are four more nickels than dimes.
11(.05) +.1(7) = 1.25
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Now that we've tried it, we know there are 7 dimes in his pocket.
Tell me if this helps!
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3 years ago
Can anybody help me please hurry this is due
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Answer:

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Help on questions 11 and 15 Add and simplify if possible
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a expression that shows how to multiply 7 times 256 using expanded form and the distributive property.
nikitadnepr [17]
256×7=
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