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4 years ago

Solve. 5 = –(–z + 3) a. –8 b. 8 c. –2 d. 2

Mathematics

2 answers:

Harlamova29_29 [7]4 years ago

6 0

-(-z + 3) equals z - 3

5 = z - 3

z = 8

gulaghasi [49]4 years ago

5 0

-(-z + 3) equals z - 3
5 = z - 3
z = 8

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Horses cost $10, pigs cost $3, and rabbits are only $0.50. a farmer buys 100 animals for $100. how many of each animal did he bu

Oksanka [162]

You can use the following equation:

10h+3p+0.5r=100

This equation uses “h” “p” and “r” to represent the number of animals bought, each variable having a coefficient which is that animal's price. The right side is the total price.

You will now need a second equation so you can proceed to substitution/elimination:

h+p+r=100

This equation, using the same variables, represents the total number of animals to be bought.

We can eliminate the “h” variable by multiplying the bottom equation by -10, you now have the following:

10h+3p+0.5r=100

-10h-10p-10r=-1000

Add down and the result is:

-7p-9.5r=-900

You can set up a proportion

-9.5r=-900+7p

r=(-900+7p)/-9.5

And substitute in the original equation…

P.S. I challenge you to figure out the rest on your own because it is really just a tedious process of substitution and elimination from here and my phone is about to die. I'll check in later if you're still having problems.

8 0

4 years ago

In a group of 50 students 38 play chess and 24 play scrabble. How many plays both chess and scrabble.

Grace [21]

Answer:

Solve:

to solve, first add both partial numbers together

38 + 24 = 62

then subtract the whole number

62 - 50 = 12

Step-by-step explanation:

the way this works is the overflow when adding the two numbers, is the amount of students that do both, they count in both groups meaning their counted twice, this means that if each student dropped a coin for what they played (1 for chess and/or 1 for scrabble) the 12 students who played both would drop two coins

not a professional explanation but i hope it makes sense ^^

4 0

2 years ago

Please help pleaseee

Nataly_w [17]

Answer:

4 Thank you cards

Step-by-step explanation:

lmk if you need the work on how i got it :)

4 0

3 years ago

Read 2 more answers

{x{ x + 4<0 or 6x>-12)

lora16 [44]

Answer:

$x\in (-\infty , -4) \cup (-2,+\infty)$

Step-by-step explanation:

Solve the system of inequalities:

x + 4 < 0

OR:

6x > -12

The first inequality yields the solution:

x < -4

The second inequality gives the solution:

x > -2

The total solution is the disjunction of the individual solutions, i.e., the union of both.

It can be expressed as

$\mathbf{x\in (-\infty , -4) \cup (-2,+\infty)}$

4 0

3 years ago

Two runners are saving money to attend a marathon. The first runner has $112 in savings, received a $45 gift from a friend, and

Volgvan

Answer:

The correct answer is the last option, that is,

112 + 25m + 45 = 50 + 60m

Step-by-step explanation:

We have been given that the first runner has $112 in savings, received a $45 gift from a friend, and will save $25 each month. Therefore, amount of money in the account of first running after m months will be: 112 + 45 + 25m

We have been given that the second runner has $50 in savings and will save $60 each month. Therefore, amount of money in the account of second running after m months will be: 50 + 60m

In order for amount of money to be equal in accounts of both the runners, we set up: 112 + 45 + 25m = 50 + 60m

Upon rewriting the left hand side using commutative law, we get:

112 + 25m + 45 = 50 + 60m

Therefore, we can see that the last option is the correct answer.

I hope this helped. I am sorry if you get this wrong.

4 0

3 years ago

Read 2 more answers