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Zolol [24]
3 years ago
15

Use substitution to solve the linear system of equations.

Mathematics
1 answer:
DIA [1.3K]3 years ago
3 0
Plug x-2 into y on the second equation

2x + 4 = x - 2 then just solve for x
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A punch bowl had 2\dfrac122 2 1 ​ 2, start fraction, 1, divided by, 2, end fraction liters of juice in it. Liam drank \dfrac13 3
8_murik_8 [283]

Answer:

5/6 liters.

Step-by-step explanation:

Given that:

Amount of juice in a punch bowl = 2 * 1/2 liters

= 5/2 liters.

Part of juice drank by Liam from the bowl = 1/3

Amount of juice drank by Liam =

= 5/2 * 1/3 = 5\6 liters.

4 0
3 years ago
ms. James has a 6 square foot bulletin board and a 12 square food bulletin board. She wants to cover both boards with index card
Anon25 [30]

Answer:

<em>She need </em><em>72 </em><em>index cards.</em>

Step-by-step explanation:

Ms. James has a 6 square foot bulletin board and a 12 square food bulletin board and she wants to cover both boards with index cards without gaps or overlaps.

Each index card has an area of \dfrac{1}{4} square foot.

Dividing the area of each board with the area of the index card will yield the the number of cards she needs to cover up completely.

Let us assume T₁ and T₂ are the number of cards she needs to cover 6 square feet food bulletin board and 12 square feet food bulletin board respectively. So

T_1=\dfrac{6}{\frac{1}{4}}=24,\\\\T_2=\dfrac{12}{\frac{1}{4}}=48

Therefore, in total she need 24+48=72 index cards.

7 0
3 years ago
Solve using completing the square x^2 – 8x + 16 = 25
lisov135 [29]

First we need to factor the left side. Since it is a perfect square (as is the process with completing the square, we know we can take half of the middle number along with x to be in the two parenthesis.

(x - 4)(x - 4) = 25

Now we simplify to show it as a square.

(x - 4)^2 = 25

Next we take the square root of both sides

x - 4 = +/- 5

Note that we have plus or minus 5. This is because either square would give us positive 25. Now we add 4 to both sides

x = 4 +/- 5

4 + 5 = 9

4 - 5 = -1

5 0
3 years ago
39/4 as a mixed number
disa [49]
39 ÷ 4 is 9, with a remainder of 3. Then, you put 3 as the numerator, so your answer is 9 3/4. Hope this helps!
8 0
3 years ago
Read 2 more answers
What is x² + x + 49 on 2020 edg?
Verdich [7]

Answer:

259

Step-by-step explanation:

6 0
3 years ago
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