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notsponge [240]
2 years ago
14

Evaluate the expression when c=4 and d=40 d-5c

Mathematics
1 answer:
Illusion [34]2 years ago
3 0

Answer:

20

Step-by-step explanation:

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Leah's age is twice her cow old are Leah and her cousin?usin's age. If they add their ages together they get 36. How old are Lea
nignag [31]
Okay so lets call Leah "L" and her cousin "C". We know that L+C=36 ... we also know that Leah is twice her cousins age. Therefore, L=2 times C, or L=2C. This is because Leah's age is equivalent to twice as much as her cousin's. 
Now that you know that L=2C, you can plug this back into the equation. This should make it so that's there's only one variable now! 
L+C=36
(2C)+C=36   ... here we subbed in L=2C
3C=36     ... we add up the C's
C=12   ... we isolate for C by dividing both sides by 3

So her cousin's age is 12 years old. Leah's age is twice that. Thus, she's 24. If you add the two up: 12+24, you indeed get 36. Hope that helps :))
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3000x + 1000y < 30000
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x = 7.5
y = 7.5

3 0
3 years ago
Please help! <br>Factor f(x)=x^4-x^3-7x^2+13x-6 completely. Then sketch the graph
stich3 [128]

For the complex roots I got 1,2,-3

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3 years ago
Why is my dad so mean to me?
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6 0
2 years ago
Read 2 more answers
Can someone help me please
natima [27]

Answer:

(-4,2)

Step-by-step explanation:

The line going horizontal is the X-axis. And they line going up and down is the y-axis. The way you write the location of a point is (X,Y). Hope this helps!!

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