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3 years ago

Why -4 x (-4) = 16 not -16? Simple...

1 answer:

4 0

The reason why it is a positive 16 and not a negative 16, is because when you multiply a negative number with another negative number you will always get a positive number. But, if you multiple a negative number with a positive number, you will get a negative. So, in order for you to get a -16, the equation would have to be -4*4=-16.

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Find the product<br> 876 greater or equal to 65 =

Salsk061 [2.6K]

Greater ..............

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3 years ago

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See the question attached. Please help

Lelu [443]

Answer:

1) 36

2) 190

3) 72 units

Step-by-step explanation:

1) 2x4 = 8 units area for rectangle

(4-2) x4 /2 = 4 units

6 x 4 = 24 units

8 + 4 + 24 = 36

2) 3 x 10 / 2 = 15 units

5 x 10 /2 = 25 units

15 x 10 = 150 units

150 + 25 + 15 = 190 units

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2 years ago

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Factor this expression completely, then place the factors in the proper location on the grid. (Hint: First, factor using differe

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Answer: x= y =

Step-by-step explanation:

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2 years ago

In the following figure, triangle ABC and triangle DEF are similar. What is the value of x ? Triangle ABC and triangle DEF are s

Shtirlitz [24]

X = 25.5 mm.

Using the similarity statement given, that ΔABC ~ ΔDEF, we set up a proportion:

8.5/x = 4/12

Cross multiply:
4*x = 8.5*12
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Divide both sides by 4:
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2 years ago

An escalator lifts people to the second floor of a building, 25 ft above the first floor. The escalator rises at a 30o angle. To

melamori03 [73]

Answer:

a person travel 50 ft from the bottom to the top of the escalator

Step-by-step explanation:

An escalator lifts people to the second floor of a building, 25 ft above the first floor. The escalator rises at a 30 degree angle

The escalator forms a right angle triangle

opposite to 30 degree angle is 25 feet. to find the distance from the bottom to the top of the escalator we find the hypotenuse

let x be the hypotenuse

$sin(theta)=\frac{opposite}{hypotenuse}$

$sin(30)=\frac{25}{x}\\x sin(30)= 25\\x=\frac{25}{sin(30)} \\x=50\\$

a person travel 50 ft from the bottom to the top of the escalator

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2 years ago