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ANEK [815]
3 years ago
14

Describe how to use a tens fact to find the difference for 15-8

Mathematics
2 answers:
lutik1710 [3]3 years ago
8 0
you can round 15 to 20 and 8 and to 10
Svet_ta [14]3 years ago
3 0

How to use mental strategies to subtract within 20 using the "break down to 10" strategy? With practice, this strategy can help students gain fluency when subtracting within 20. By now children should be very comfortable with the sum-equals-ten addition and subtraction facts, such as 4+6=10 and 10-7=3.

Write 15-8=? on the board. Explain that:

1. 15=10+5;

2. 8=5+3;

3. 15-8=10+5-5-3=10-3=7.

Answer: 15-8=7.

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Just set the perimeter equation equal to each other and put the values in that you know and solve
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4 years ago
Aimee is flying a plane for the first time! The air traffic controller tells her to fly at 500m above the ground or higher. Writ
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She needs to fly at 500 or higher which means that the equation needs to include
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3 years ago
F(x)=x^2+6x+3 complete The square and put the equation into vertex form
Svet_ta [14]

Answer:

y=(x+3)^2−6

Step-by-step explanation:

im not 100% but i think its right

6 0
3 years ago
Read 2 more answers
1.Write an example of how the product of two different irrational numbers can be a rational number.
Digiron [165]

Answer:

1 "The product of two irrational numbers is SOMETIMES irrational." The product of two irrational numbers, in some cases, will be irrational. However, it is possible that some irrational numbers may multiply to form a rational product.

2 The quotient has widespread use throughout mathematics, and is commonly referred to as a fraction or a ratio. For example, when dividing twenty (the dividend) by three (the divisor), the quotient is six and two thirds. In this sense, a quotient is the ratio of a dividend to its divisor.

3 The sum of two irrational numbers, in some cases, will be irrational. However, if the irrational parts of the numbers have a zero sum (cancel each other out), the sum will be rational. "The product of two irrational numbers is SOMETIMES irrational."

Step-by-step explanation:

3 0
3 years ago
A circular swimming pool has a radius of 28 ft. There is a path all the way around the pool that is 4 ft wide. A fence is going
AleksAgata [21]

Answer:

200.96 feet

Step-by-step explanation:

We have a pool with a radius of 28 feet.

They also tell us that there is a path around the pool and its width is 4 feet.

Thus:

The radius of the outer edge of the pool path would be equal to the radius of the pool plus the width of the path.

= (28 + 4) feet

= 32 feet

To find the length of the fence, we need to find the circumference of the outside of the pool path. The radius is then equal to 32 feet.

The circumference of the outer edge of the pool path would be equal to the perimeter.

p = 2 * pi * r

replacing

p = 2 * 3.14 * 32

p = 200.96 feet

therefore 200.96 feet are needed

4 0
3 years ago
Read 2 more answers
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