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3 years ago

When will adding two negatives and multiplying two negative is become a negative or positive

Mathematics

1 answer:

Vikentia [17]3 years ago

3 0

Answer:

When you multiply two negative numbers, is the answer negative or positive? Multiplying two negative numbers always gives positive result. Even more. If numbers are both positive or negative, then resulth is positive, if numbers is one positive and one negative, result is always negative.

Step-by-step explanation:

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What is the cost of 5 pounds of bananas if 2 pounds cost $1.16

serious [3.7K]

The answer is $2.90

Hope that helps

7 0

3 years ago

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Which trigonometric ratios are correct for triangle ABC? Check all that apply

sergij07 [2.7K]

Consider an angle M with measure m≠90°, in a right triangle.

Let

OPP denote the length of the side opposite to M,
ADJ denote the length of the side adjacent to M, and
HYP denote the hypotenuse.

then:

Sin(M) = OPP/HYP
Cos(M)= ADJ/HYPP
Tan(M)=OPP/ADJ

Back to our problem,

using the Pythagorean we can find the length of AB:

$|AB|^2+|AC|^2=|BC|^2\\\\|AB|^2+9^2=18^2\\\\|AB|^2=18^2-9^2\\\\|AB|^2=(18-9)(18+9)=9 \cdot 27=9 \cdot 9 \cdot3\\\\|AB|=9 \sqrt{3} 
$

$Sin(C)= \frac{OPP}{HYP}=\frac{9 \sqrt{3} }{18}= \frac{ \sqrt{3} }{2}$
$Cos(B)= \frac{ADJ}{HYP}= \frac{9 \sqrt{3}}{18}= \frac{ \sqrt{3}}{2}$
$Tan(C)= \frac{OPP}{ADJ}= \frac{9 \sqrt{3} }{9}= \sqrt{3}$
$Sin(B)= \frac{OPP}{HYP}= \frac{9}{18}= \frac{1}{2}$
$Tan(B)= \frac{OPP}{ADJ}= \frac{9}{9 \sqrt{3}}= \frac{1}{ \sqrt{3} }= \frac{ \sqrt{3}}{3}$

Answer: 1, 3, 4

5 0

3 years ago

Use the diagram and the Pythagorean Theorem to find the EXACT area of square ABCD

Burka [1]

ANSWER

The area of square ABCD is
$25 \: square \: unit$

EXPLANATION

The area of square ABCD is the square of the length of one side.

That is the area of ABCD is |AD|²

From Pythagoras theorem,

${|AD|}^{2} = { |AG| }^{2} + { |GD| }^{2}$

We can read from the graph that, each box is one unit.

This implies that,

${|AD|}^{2} = {4}^{2} + {3}^{2}$

${|AD|}^{2} =16 + 9$

${|AD|}^{2} =25$

Therefore the area of square ABCD is 25 square units.

The correct answer is option C.

5 0

3 years ago

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13. Oscar's dog house is shaped like a tent. The slanted sides are both 5 feet

VashaNatasha [74]

Answer:

The height of the dog house = 4 feet.

Step-by-step explanation:

Given:

The shape of the dog house is like a tent.

The slant heights of the house is 5 feet.

The bottom of the house is 6 feet across.

To find the height of the dog house at its tallest point.

Solution:

On drawing the figure of the dog house in the shape of a tent, we find out that the tallest point would be at the midpoint of the bottom of the house.

Thus, we ave a right triangle, of which one leg = $\frac{6\ ft}{2}=3\ ft$ and hypotenuse = $5\ ft$

<em>Applying Pythagorean theorem to find the measure of the other leg which is the height of the house.</em>

$Hypotenuse^2=Leg1^2+Leg2^2$

Plugging in values.

$5^2=3^2+Leg2^2$

$25=9+Leg2^2$

Subtracting both sides by 9.

$25-9=9-9+Leg2^2$

$16=Leg2^2$

Taking square root both sides.

$\sqrt{16}=\sqrt{Leg2^2}$

$4=Leg2$

Thus, the height of the dog house = 4 feet.

6 0

4 years ago

Please help me with this question. only put the real answer down.

Angelina_Jolie [31]

Direct variations look like this (y = 3x_
Not direct variations (or inverse variations) look like this (y= 1/3x.) They are often in fraction form.

So, in your problem the direct variations are:
y= 3x
x = -1
-0.5x = y
y= 2.2x +7
y= 4

The non-direct variations are:
y = 2/7x

7 0

3 years ago

When will adding two negatives and multiplying two negative is become a negative or positive ​

When will adding two negatives and multiplying two negative is become a negative or positive