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Inessa [10]
3 years ago
6

Why is -2.2 x (-3.7) = -8.14 wrong ?? I need a reason to see why it’s wrong

Mathematics
2 answers:
asambeis [7]3 years ago
5 0

Answer:

because multiplying two negatives equals a positive

Step-by-step explanation:

Lorico [155]3 years ago
4 0

it is a positive integer because there are 2 negatives. when you are multiplying or dividing negatives, it always makes a positive

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The total length of pencils A, B and C is 29 cm. Pencil a is 11 cm shorter then pencil B, and pencil B is twice as long a pencil
satela [25.4K]

The length of pencil A is 5 cm

<em><u>Solution:</u></em>

Let the length of pencil A be "x"

Let the length of pencil B be "y"

Let the length of pencil C be "z"

<em><u>The total length of pencils A, B and C is 29 cm</u></em>

Therefore,

length of pencil A + length of pencil B + length of pencil C = 29

x + y + z = 29 ------------ eqn 1

<em><u>Pencil A is 11 cm shorter then pencil B</u></em>

x = y - 11 ------- eqn 2

<em><u>Pencil B is twice as long a pencil C</u></em>

y = 2z

z = \frac{y}{2} ------ eqn 3

<em><u>Substitute eqn 2 and eqn 3 in eqn 1</u></em>

y - 11 + y + \frac{y}{2} = 29\\\\2y + \frac{y}{2} = 29 + 11\\\\\frac{4y+y}{2} = 40\\\\5y = 80\\\\y = 16

<em><u>Substitute y = 16 in eqn 2</u></em>

x = 16 - 11

x = 5

Thus length of pencil A is 5 cm

5 0
3 years ago
When 4 is added to three times of a number, the answer is the same as subtracting 2 from the number. What is the number ?
Orlov [11]

Answer:

- 3

Step-by-step explanation:

let n be the number , then

3n + 4 = n - 2 ( subtract n from both sides )

2n + 4 = - 2 ( subtract 4 from both sides )

2n = - 6 ( divide both sides by 2 )

n = - 3

The number is - 3

7 0
3 years ago
What’s the digit you need to input in the space with the question mark to complete the code for the safe? Here’s a hint to save
elena55 [62]

Answer:

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Step-by-step explanation:

2×2=4

6÷2=3

1×2=2

8÷2=4

3×2=6

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6 0
2 years ago
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What is the area of this polygon?
Oksi-84 [34.3K]

all you have to do is add up all the sides and your answer will be 21 cm

7 0
3 years ago
Please help its due soon its geometry
Anastasy [175]

Answer:

7, 7, 60, 60, 60

Step-by-step explanation:

When you draw the circles thhey all hhave radius AB so AB=AC=BC =7

and since all sides are congruent you have a equilateral treangle so all angles are equal to 180/3=60

5 0
3 years ago
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