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viktelen [127]
4 years ago
11

What is the product of -3 and 5? O -15 08 a 08 O 15

Mathematics
2 answers:
vovikov84 [41]4 years ago
6 0

Answer:

A. -15

Step-by-step explanation:

First, ignore the negative sign and simply pretend the problem is asking for the product of 3 and 5.

When multiplying a by b, it's essentially the same as adding a to itself b times. Here, we multiply 3 by 5, so add 3 to itself 5 times: 3 + 3 + 3 + 3 + 3 = 15.

Now, look at the negative sign. When we multiply two numbers of different signs (one is negative and one is positive), the result is always negative. However, when we multiply two numbers of the same sign (either both positive or both negative), the result is always positive.

Here, we have one negative and one positive, which means the result should be negative. So, add a negative sign to 15 to get -15.

The answer is A.

Greeley [361]4 years ago
4 0

Answer:

-15

Step-by-step explanation:

Product of a and b is:

a × b

Similarly, the product of -3 and 5 is:

-3 × 5

-15

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Step-by-step explanation:

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3 years ago
In ΔABC, if AB = 14 and BC = 9, AC may be equal to
Pie

Answer:

AC could be any number of these numbers 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22

Step-by-step explanation:

There is a fact in any triangle:

<em>The length of any side of a triangle must be greater than the difference of the lengths of the other two sides and smaller than the sum of the lengths of the other two sides</em>

If the lengths of the three sides of a triangle are a , b and c, then

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  • b - c < a < b + c
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In Δ ABC:

→ (BC) - (AC) < AB < (BC) + (AC)

→ (AB) - (AC) < BC < (AB) + (AC)

→ (AB) - (BC) < AC < (AB) + (BC)

∵ AB = 14 units

∵ BC = 9 units

- Find the sum and difference of them

∵ AB - BC = 14 - 9

∴ AB - BC = 5

∵ AB + BC = 14 + 9

∴ AB + BC = 23

- That means the length of AC could be any integer greater

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∴ 5 < AC < 23

AC could be any number of these numbers 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22

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4 years ago
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