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Sedaia [141]
3 years ago
10

⎧ ​ y=2x+3 y=−3x+3 ​

Mathematics
1 answer:
masha68 [24]3 years ago
4 0
What exactly do u want us to do?
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Solve this inequality for y.<br> - 3y + 12 26
Gennadij [26K]

Answer:

-2^5

Step-by-step explanation:

hope it helped. im not sure..

4 0
2 years ago
A 7 kg ham costs $19/kg. Find the cost per pound.
stepan [7]

Answer: \$8.62/\text{Pound}

Step-by-step explanation:

Given

There is 7\ kg of ham available which costs

cost=\$\ 19/kg

i.e.

1\ kg\ \text{costs}\ \$19

and we know

1\ kg=2.204\ \text{pound}

So, 2.204\ \text{Pound costs}\ \$19

thus 1\ \text{Pound costs}\ \dfrac{19}{2.204}=\$8.62/\text{Pound}

4 0
2 years ago
Use the method of Gauss to find the sum.1+2+3+.....+400
nikklg [1K]
Gauss' method for addition relies on the fact that you can 'pair' certain numbers together. Look at the example:

1+2+3+4+5+6+7+8+9+10

We could manually add all these together from left to right but a clever way to think about this is if we add together the ends of the sum (10+1) we get 11. If we then move one in from the ends and add these (2+9) we also get 11. This means that 1+2+...+9+10 is the same as 11+11+...+11+11.

Because each 2 numbers adds to 11 we know the total number of 11's we have to add together is the length of the sum divided by 2. In our case 5 (10 ÷ 2). We need to add 5 lots of 11 to get our answer. This is the same as 11 × 5 which is easily seen to be 55.

(If you add the 10 numbers together on a calculator you'll see 1+2+3+4+5+6+7+8+9+10 = 55) so this method really makes it a lot quicker.

Looking at your sequence, if we pair the ends together we get 401 (400+1) and we multiply this by the length of the sequence divided by 2. In your case, 200 (400 ÷ 2).

So the sum of all the numbers from 1 to 400 must be 401 × 200 = 80,200.

Remember the steps:
1. Pair the ends together and add them
2. Times this number by the length of the sequence halved

Hope this helps.
6 0
3 years ago
Okay so I'm working on solving equations<br><img src="https://tex.z-dn.net/?f=%20-%2015x%20%2B%205%20%3D%20%20-%2010x%20%2B%2025
Ksenya-84 [330]

Answer:

x = -4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

-15x + 5 = -10x + 25

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Add 15x on both sides:                    5 = 5x + 25
  2. Subtract 25 on both sides:              -20 = 5x
  3. Divide 5 on both sides:                   -4 = x
  4. Rewrite:                                             x = -4
8 0
2 years ago
Please help ASAP with geometry! Will give brainliest
Marysya12 [62]

Answer:

360

Step-by-step explanation:

All circles can be divided into 360 units called degrees. Since there is 270 already we subtract 270 from 360.

360 - 270 = 90

90 + 150 + 120 = 360

5 0
3 years ago
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