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GaryK [48]
4 years ago
13

Which strategy would you use to find 28?explain how you decided

Mathematics
1 answer:
Gelneren [198K]4 years ago
5 0
You can do all strategies. Multiplication, Division, Addition, and Subtraction are the strategies because you can multiply 7 by 4 to get 28, divide 56 by 2 to get 28, add 14 by 14 to get 28, or subtract 40 by 12 to get 28.
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What’s the answer to this?
fgiga [73]

Answer:

87

Step-by-step explanation:

5 0
4 years ago
Pls help answer this
Paladinen [302]

Answer: Third option

Step-by-step explanation:

For this exercise it is important to remember the following:

1. By definition, the Associative property of addition states that it does not matter how you grouped the numbers, you will always obtained the same sum.

2. The rule for the  Associative property of addition is the following (given three numbers "a", "b" and "c"):

a + (b + c) = (a + b) + c

Knowing the information shown before, you can identify in the picture attached that the option that illustrates the Associative property of addition is the third one. This is:

(11+8)+1=11+(8+1)

As you can notice that you will always get the same result:

(19)+1=11+(9)\\\\20=20

8 0
3 years ago
What's 2sin(2theta)=1? Need it for webassign.
lutik1710 [3]
<em>Solve: </em>2sin(2x) = 1

Divide both sides by 2.
sin(2x) = \frac{1}{2}

Take the sine inverse of both sides:
2x = sin^{-1}(\frac{1}{2})
2x = \frac{\pi}{6}, \frac{5\pi}{6}, 0 \leq x \leq 2\pi
x = \frac{\pi}{12}, \frac{5\pi}{12}

But we know there are more solutions if we extend the domain. In fact, there are infinitely more solutions since the domain of sine is all real x values.
Thus, we can develop a general solution:

For every \pi units, there is another solution for both \frac{\pi}{12} and \frac{5\pi}{12}

General solutions:
x = \pi n + \frac{\pi}{12}, n \in \mathbb{Z}
x = \pi n + \frac{5\pi}{12}, n \in \mathbb{Z}
7 0
3 years ago
Lisa and Ann are eating a box of crackers. Lisa eats 3/6 of the box, and Ann eats 1/4 of the box. How much of the box did the tw
sasho [114]

Answer:

the girls ate \frac{3}{4} of the box

Step-by-step explanation:

\frac{3}{6} = \frac{1}{2} = \frac{2}{4} ,,,\frac{1}{4} +\frac{2}{4} =\frac{3}{4}

7 0
3 years ago
Could someone help me? the video doenst explain it
True [87]

Personally, I would recommend reading this as a fraction, and splitting up mantissa from the power of 10. (Mantissa refers to the number 1.23 in 1.23\times10^n.)

\left(3.6 \times 10^{-5}\right) \div \left(9 \times 10^{-7}\right) = \dfrac{3.6 \times 10^{-5}}{9 \times 10^{-7}} = \dfrac{3.6}9 \times \dfrac{10^{-5}}{10^{-7}}

Now just reduce each fraction:

\dfrac{3.6}9 = \dfrac{36}{90} = \dfrac25 = 0.4

\dfrac{10^{-5}}{10^{-7}} = 10^{-5-(-7)} = 10^{-5+7} = 10^2

So

\left(3.6 \times 10^{-5}\right) \div \left(9 \times 10^{-7}\right) = 0.4 \times 10^2 = \boxed{4 \times 10^1}

since 0.4\times10^2 = 0.4 \times 100 = 40 = 4 \times 10.

7 0
3 years ago
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