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nasty-shy [4]
3 years ago
6

What is cramers rule.

Mathematics
1 answer:
Jobisdone [24]3 years ago
6 0

Cramer's Rule is a method that uses determinants to solve systems of equations that have the same number of equations as variables

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Betty has 741 coins in her piggy bank, worth a total of 10,725 cents. The piggy bank only contains quarters and dimes. How many
quester [9]
Let quarters = q and
Dimes = d

We have 741 coins total so q + d = 741

Since quarters are 25 cents and Dimes are 10 cents then

25q + 10d = 10725 cents

Now we have 2 equations that we can solve using addition or substitution.

Using addition, first multiply the first equation by -10

-10 (q+d) = 741 (-10)
-10q - 10d = -7410

Now add the equations together

(-10q -10d = -7410)
+ (25q + 10d =10725)
________________
15q = 3315
q = 3315 / 15
q = 221
this is the number of quarters

Now plug this back into the original equation

q + d = 741
221 + d = 741
d = 741 - 221
d = 520

There are 520 dimes

6 0
3 years ago
Joe drew 32 pictures in his sketch book. He drew four times as many pictures as Kevin. How many pictures did Kevin draw?
stealth61 [152]

Answer:

8

Step-by-step explanation:

7 0
3 years ago
Help me on this one too please, thanks...
KIM [24]

Answer:

-3

Step-by-step explanation:

-3 is the highest number in the set

5 0
3 years ago
Read 2 more answers
Please help me i need an answer
gregori [183]
Tom wants to save at least $2000. He already got $375. Let x be the amount he still needs to save.

375 + x >= 2000
Subtract 375 from both sides
375 + x - 375 >= 2000 - 375
x >= 1625

So he still needs to save at least $1625.

Hope this helps! :)
3 0
3 years ago
Evaluate (16+a)+ 6b divided by 3 when a = 2 and b = 3
yawa3891 [41]

Answer:   24

Step-by-step explanation:

Follow PEMDAS. Parentheses: 16+a, which is 18. There are no exponents so move on to multiplication. 6b. B is equal to 3, and 6x3 is 18. Next, division. 18/3 is 6. Now do addition so add together 18+6 which is 24.

4 0
2 years ago
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