All categories

3 years ago

Estimate the product. Choose a method 33 X 76

2 answers:

6 0

The method I'll be presenting is the old traditional way, hehe.

33
x 76
——

1) 3 x 6 is 18.

1
33
x 76
——
8

2) Again, 3 x 6 is 18, adding 1 (since you carry the 1 in 18 over) is 19.

1
33
x 76
——
198

3) 3 x 7 is 21.

2 1
33
x 76
——
198
1

4) Once again, 3 x 7 is 21, plus 1 is 23.

2 1
33
x 76
——
198
231
———

4) Now we add 198 + 231.

33
x 76
——
1 198 (PS. carry the
231 one in 1+9)
———
2508

5) Now we round, in this case we shall round to the nearest thousand since it makes sense too.

2,508
^
Take a look at the thousands place, which is two.

2,508
^
To the right of 2 is 5. Any number to the right between 5-9 you add one to the place value and zap the rest of the numbers to the right to 0. So...

2,508 rounded is
3,000

The answer is 3,000.

Hoped I helped!

Serhud [2]3 years ago

3 0

Use the tens.Try 30x80. 76 rounds up to 80 and 33 rounds down to 30.

You might be interested in

Identify the vertex and the y-intercept of the graph of each function. Show your work

olga2289 [7]

vertex
y = 3(x - 2)² - 4
y = 3((x - 2)(x - 2)) - 4
y = 3(x² - 2x - 2x + 4) - 4
y = 3(x² - 4x + 4) - 4
y = 3(x²) - 3(4x) + 3(4) - 4
y = 3x² - 12x + 12 - 4
y = 3x² - 12x + 8
3x² - 12x + 8 = 0
x = -(-12) +/- √((-12)² - 4(3)(8))
 2(3)
x = 12 +/- √(144 - 96)
 6
x = 12 +/- √(48)
 6
x = 12 +/- 6.93
 6
x = 2 +/- 1.155
x = 2 + 1.155 x = 2 - 1.155
x = 3.155 x = 0.845
y = 3x² - 12x + 8
y = 3(3.155)² - 12(3.155) + 8
y = 3(1.334025) - 3.786 + 8
y = 4.002075 - 3.786 + 8
y = 0.216075 + 8
y = 8.216075
(x, y) = (3.155, 8.216075)
or
y = 3x² - 12x + 8
y = 3(0.845)² - 12(0.845) + 8
y = 3(0.714025) - 10.14 + 8
y = 2.142075 - 10.14 + 8
y = -7.857925 + 8
y = 0.142675
(x, y) = (0.845, 0.142675)
y-intercept
y = 3x² - 12x + 8
y = 3(0)² - 12(0) + 8
y = 3(0) - 0 + 8
y = 0 - 0 + 8
y = 0 + 8
0 = -y + 8
y = 8
(x, y) = (0, 8)
-------------------------------------------------------------------------------------------
vertex
y = 4(x - 5)² = 1
y = 4(x - 5)² - 1
y = 4((x - 5)(x - 5)) - 1
y = 4(x² - 5x - 5x + 25) - 1
y = 4(x² - 10x + 25) - 1
y = 4(x²) - 4(10x) + 4(25) - 1
y = 4x² - 40x + 100 - 1
y = 4x² - 40x + 99
4x² - 40x + 99 = 0
x = -(-40) +/- √((-40)² - 4(4)(99))
 2(4)
x = 40 +/- √(1600 - 1584)
 8
x = 40 +/- √(16)
 8
x = 40 +/- 4
 8
x = 5 +/- 1/2
x = 5 + 1/2 x = 5 - 1/2
x = 5 1/2 x = 4 1/2
y = 4x² - 40x + 99
y = 4(5 1/2)² - 40(5 1/2) + 99
y = 4(30 1/4) - 220 + 99
y = 121 - 220 + 99
y = -99 + 99
y = 0
(x, y) = (5 1/2, 0)
or
y = 4x² - 40x + 99
y = 4(4 1/2)² - 40(4 1/2) + 99
y = 4(20 1/4) - 180 + 99
y = 81 - 180 + 99
y = -99 + 99
y = 0
(x, y) = (4 1/2, 0)
y-intercept
y = 4x² - 40x + 99
y = 4(0)² - 40(0) + 99
y = 4(0) - 0 + 99
y = 0 - 0 + 99
y = 0 + 99
y = 99
(x, y) = (0, 99)
--------------------------------------------------------------------------------------------
vertex
y = (x - 1)² = 2
y = (x - 1)² - 2
y = ((x - 1)(x - 1)) - 2
y = (x² - x - x + 1) - 2
y = x² - 2x + 1 - 2
y = x² - 2x - 1
x² - 2x - 1 = 0
x = -(-2) +/- √((-2)² - 4(1)(-1))
 2(1)
x = 2 +/- √(4 + 4)
 2
x = 2 +/- √(8)
 2
x = 2 +/- 2.83
 2
x = 1 +/- 1.415
x = 1 + 1.415 x = 1 - 1.415
x = 2.415 x = 0.415
y = x² - 2x - 1
y = (2.145)² - 2(2.145) - 1
y = 4.60125 - 4.029 - 1
y = 0.57225 - 1
y = 0.42775
(x, y) = (2.415, 0.42775)
or
y = x² - 2x - 1
y = (0.415)² - 2(0.415) - 1
y = 0.172225 - 0.83 - 1
y = -0.657775 - 1
y = -1.657775
(x, y) = (0.415, -1.657775)
y-intercept
y = x² - 2x - 1
y = (0)² - 2(0) - 1
y = 0 - 0 - 1
y = 0 - 1
y = -1
(x, y) = (0, -1)

6 0

3 years ago

The graph of a quadratic function contains the points

masya89 [10]

Answer:

Shawn is correct.

Step-by-step explanation:

Let the quadratic function is g(x) = a(x - h)² + k

Here (h, k) is the vertex of the parabola.

Since this parabola passes through (0, 0), (1, 9) and (-1, 9), axis of symmetry is x = 0 and the vertex is (0, 0).

Therefore, equation of the parabola will be,

g(x) = a(x - 0)²+ 0

g(x) = ax²

for a point (1, 9) which lies on the graph,

9 = a(1)²

a = 9

g(x) = 9x² (here a > 1)

Therefore, f(x) is vertically stretched by a factor of 9 to form g(x).

Shawn is correct.

3 0

3 years ago

There are 3 balls in a hat; one with the number 1 on it, one with the number 6 on it, and one with the number 7 on it. You

V125BC [204]

Answer:

coin: ball:

head -- 6

tail -- 6

6 0

3 years ago

(2x - 1) (4x + 28)°

Sati [7]

Answer: 8x^2° + 52x° + 27°

Using the knowledge i know i think this is the right answer

Have a great day :)

4 0

3 years ago

6 out of 24 employees at the water slides are temporary employees what percentage of the employees at the water slide are tempor

kykrilka [37]

Answer:

25%

Step-by-step explanation:

The question is:

6 is what percent of 24?

Set up the problem:

6 x

---- = -----

24 100

600 / 24 = 25%

Check your answer:

25% + 25% + 25% + 25% = 100%

6 + 6 + 6 + 6 = 24

3 0

3 years ago