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exis [7]
3 years ago
9

The price of an item has risen to $276 today. Yesterday it was $115. Find the percentage increase.

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
6 0
Are you kidding me, bro? lol

276-115=131
131 divided by 276 = 0.47

0.47% increase
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This rectangular patio is tiled using 50 cm by 50 cm square tiles. How many tiles are used?
Bad White [126]

Answer:

60 tiles are used

Step-by-step explanation:

1m equals 100 cm.

5m equals 500

3m equals 300

the whole thing is 500 by 300 which when you multiply gives you

150,000. When you multiple 50 by 50 it gives you 2,500. So when you divide 150,000 by 2,500 it gives you a total of 60 tiles. HOPE THIS HELPS

5 0
3 years ago
Read 2 more answers
Use order of operations to make this true 7 11 4 2 = 10
Keith_Richards [23]

Answer:

7 + 11 - 4 \times 2 = 10

Step-by-step explanation:

Using order of operations, the first thing to be calculated would be 4 \times 2.

That would turn our equation into this:

7 + 11 - 8 = 10

You can then calculate left-to-right as usual to get the answer 10.

5 0
3 years ago
Solve the following system of equations algebraically:<br> y = x2 - 6x + 9<br> y = -9x + 19
Ratling [72]
{(-5,64), (2,1)}

linear equation: y = -9x + 19
quadratic equation: y = x² - 6x + 9

Substitute the y in the quadratic equation by the its value in the linear equation.

-9x + 19 = x² - 6x + 9
      -  19               - 19    *subtract 19 to both sides
-9x         = x² - 6x -10
+9x              + 9x            *add 9x to both sides
0            = x² + 3x - 10
0            = (x + 5) (x - 2) *Factor

Set each factor = 0 and solve
x + 5 = 0    ;      x - 2 = 0
x = -5         ;      x = 2

Find the corresponding value of y using the linear equation.
y = -9x + 19

x = -5                              x = 2
y = -9(-5) + 19               y = -9(2) + 19
y = 45 + 19                    y = -18 + 19
y = 64                            y = 1

(-5,64)                              (2,1)

Check each value on each equation.
y = x² - 6x + 9
(-5,64)                                                  (2,1)
64 = (-5)² - 6(-5) + 9                          1 = 2² - 6(2) + 9
64 = 25 + 30 + 9                                1 = 4 - 12 + 9
64 = 64                                               1 = 1

y = -9x + 19
64 = -9(-5) + 19                                  1 = -9(2) + 19
64 = 45 + 19                                      1 = -18 + 19
64 = 64                                              1 = 1

{(-5,64), (2,1)}

3 0
2 years ago
3/4 + 3/4 + 3/4 = 9 x ?
Dominik [7]
\frac{3}{4} + \frac{3}{4} + \frac{3}{4} = 9x \\ \\ \frac{9}{4} = 9x \\ \\ \frac{9}{4 \times 9} = x \\ \\ \frac{9}{36} = x \\ \\ x = \frac{1}{4} \\ \\

The answer is: x = 1/4 or x = 0.25.
7 0
2 years ago
The sum of five consecutive numbers is 700, what is the first number?
Feliz [49]

Answer:

The first number is 138.

Step-by-step explanation:

Let the first number be <em>x.</em>

<em />

Then since they are consecutive numbers, the second number will be (<em>x</em> + 1), the third (<em>x</em> + 2), the fourth (<em>x</em> + 3) and the fifth being (<em>x</em> + 4).

We are given that their sum is 700. Therefore:

x+(x+1)+(x+2)+(x+3)+(x+4)=700

Solve for <em>x</em>. Combine like terms:

5x+10=700

Subtract 10 from both sides:

5x=690

Divide both sides by five. Therefore:

x=138

The first number is 138.

5 0
3 years ago
Read 2 more answers
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