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4 years ago

What is X+y=-1 X-y=7

Mathematics

1 answer:

Shtirlitz [24]4 years ago

3 0

Answer:

Step-by-step explanation:

X+y=-1

X-y=7

Ys are additive inverse’s.

X+x+y-y=7-1

2x=6

X=3

Plug x=3 into x+y=-1

3+y=-1

-3 both sides

Y=-4

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A room is 5 meters by meters . How many square 14-inch tiles will it take to floor the room ? I meant to say a room is 5 meters

lesya [120]

Given:

Room is 5 meters by 8 meters.

Measure of squaree tiles is 14-inch.

$\begin{gathered} \text{Area of the room=5}\times8 \\ \text{Area of the room=}40m^2 \end{gathered}$ $1m^2=1550inch^2$ $\begin{gathered} \text{Area of each tile=14}\times14 \\ \text{Area of each tile=}196inch^2 \end{gathered}$ $\begin{gathered} \text{Number of tiles to floor the room=}\frac{40\times1550}{196} \\ \text{Number of tiles to floor the room}=316.3265 \end{gathered}$

Approximately 316 tiles are required to floor the room.

8 0

1 year ago

please help me solve. Blank 1 I have the answer 9 and blank 2 I have the answer 5. Blank 2 is correct but not Blank 1

Sidana [21]

Amplifying,

$3\text{ }\sqrt[]{45}\rightarrow\sqrt[]{(3^2)\cdot45}\rightarrow\sqrt[]{9\cdot45}\rightarrow\sqrt[]{405}$

Now, let's simplify:

$undefined$

Blank 1:

405

Blank 2:

$undefined$

8 0

2 years ago

Using y=6-3x plot the ordered pairs from the table then graph the function represented by the ordered pairs and tell whether the

Alborosie

Answer:

9 , -9, -15, -21

Step-by-step explanation:

6-3x-1=-9

6-3x1=9

6-3x3=-15

6-3x5=-21

3 0

3 years ago

Read 2 more answers

. Evaluate the following: |15 - 47] + 9 - (-2)(-4) - 17|

alexdok [17]

Answer:

Step-by-step explanation:

Since there is an absolute value, the answer must be positive. Multiply 2 by 8 since two negatives equal a positive. So, |15-47 + 9 - 8 -17|. Then add and subtract to get the answer. -32 + 9 - 8 -17 = -48. |-48| = 48

8 0

3 years ago

Read 2 more answers

Jack has some marbles. He has ten more red marbles than blue marbles. He has fewer yellow marbles than blue marbles.

kap26 [50]

Answer:

<u>Jack has at least 15 marbles: 12 red, 2 blue and 1 yellow.</u>

Step-by-step explanation:

1. Let's review the information given to us to solve the problem correctly:

Number of red marbles = 10 more than blue marbles

Number of yellow marbles fewer than blue marbles

2. How many of each color marble could Jack have?

r = Number of red marbles

b = Number of blue marbles

y = Number of yellow marbles

r = b + 10

y < b

If y = 1, then b ≥ 2, and r = b + 10,

fulfilling the three conditions, we have:

5 0

3 years ago