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mezya [45]
3 years ago
5

In 15 years lisa will be four times as old as she is now. how old is she now

Mathematics
1 answer:
Eva8 [605]3 years ago
5 0

Answer:

Lisa is 5 years old

Step-by-step explanation:

we can make an equation like

4x=15+x

X can represent Lisa’s current age

Now just solve for X

3x=15

x=5

And we can check

If Lisa is 5 years old now

In 15 years she would be 20

And 20 is 4 times as 5 which Is her current age

So Lisa is 5 years old now.

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What’s the equation for this table?
-BARSIC- [3]

Answer:

y=2.5x-3

Step-by-step explanation:

first, we find the y-intercept, which is the number with a zero in the x

That would be -3

next, we find the slope

to do this, we have to take two numbers on the y side next to each other and subtract.

For this example we will use 7 and 2

7-2=5

And just to be positive, we will also do 12 and 7

12-7=5

Okay, now that we know that the number is growing by 5 every time, we know that it is now 5/2 because y is growing by 5 and x is growing by 2

Now, we make the x side grow by only 1, so to do this, we will divide both sides by two.

Now we have 5/1 or just 5

Finally, to put that into the right format, we do y=5x-3

You're Welcome

Good Luck

6 0
3 years ago
What is half of 11 5/8 inches
disa [49]
5/8 is 0.625 add 11 it becomes 11.625  multiply it by 0.5 it becomes 5.8125 
in fraction form 11 65/72
3 0
3 years ago
Read 2 more answers
15) -1 - 2mx =6yx solve for x​
tekilochka [14]
Answer : - 1 / 6y + 2m
The full solution is in the photo:)
( sorry if it’s wrong ;-; )

8 0
3 years ago
I need help with the question above
Neporo4naja [7]
2a/5b = 6

(2a-5b)/5b could be written as: (2a/5b) -(5b/5b)

Repace by its equivalent value (6) -(1) = 5

4 0
3 years ago
Jodi has two bank accounts. Her parents started Account A for her. It currently has $100 in it, and Jodi deposits $20 into it ea
Law Incorporation [45]

Answer:

(f+g)(x) = 60x + 400

Step-by-step explanation:

Given :

Amount in account A:

f(x) = 20x + 100

Amount in account B :

g(x) = 40x + 300

Total amount in Account A and B:

f(x) + g(x) = (20x + 100) + (40x + 300)

(f+g)(x) = (20x + 40x) + (100 + 300)

(f+g)(x) = 60x + 400

6 0
3 years ago
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