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3 years ago

Examine the rotation. Which best describes point D?

Mathematics

2 answers:

MAVERICK [17]3 years ago

8 0

Answer:

center of rotation

Step-by-step explanation:

it looks like a 90 degree rotation of the triangle around point D

image and pre-image don't make sense and it isn't an angle so this was the best option.

Anna007 [38]3 years ago

6 0

Answer:

center

Step-by-step explanation:

the shapes rotate around D

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How do I solve 3 x 1/4=

sergiy2304 [10]

Answer:

3/4

Step-by-step explanation:

Note that the whole number 3 = 3/1

Multiply across:

3/1 x 1/4 = (3 x 1)/(1 x 4) = (3)/(4)

3/4 is your answer.

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3 years ago

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AfilCa [17]

1220*24 = 29,280 per year

multiply that by number of years until he retires:

761280 / 29280 = 26 years

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3 years ago

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erastova [34]

Answer:

The Answer is P = (-2.5 , 1 )

Step-by-step explanation:

Let, the point is P(x,y)

then, $x=\frac{m_{1}x_{2}+ m_{2}x_{1}}{m_{1}+m_{2}}$

=> $x=\frac{5*(-1)+ 3*(-5)}{5+3}$

∴ $x=-2.5$

Again, $y=\frac{m_{1}y_{2}+ m_{2}y_{1}}{m_{1}+m_{2}}$

=> $y=\frac{5*7+ 3*(-9)}{5+3}$

∴ $y=1$

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3 years ago

A scientist has a container of 2% acid solution and a container of 5% acid solution. How many fluid ounces of each concentration

algol [13]

Let 'a' be the number of ounces of 2%-solution in the 25-ounce mixture

and 'b' be the number of ounces of 5%-solution in the 25-ounce mixture.

Since, fluid ounces of each concentration should be combined to make 25 fl oz.

So, a+b=25 (Equation 1)

And, a container of 2% acid solution and a container of 5% acid solution should be combined to make 25 fl oz of 3.2% acid solution.

So, a of 2% + b of 5% = 3.2% of 25

$(a \times \frac{2}{100})+(b \times \frac{5}{100})= 25 \times \frac{3.2}{100}$

$(0.02a)+(0.05b)= 0.8$

Multiplying the above equation by 100, we get

$2a+5b=80$ (Equation 2)

Substituting the value of a=25-b in equation 2, we get

$2(25-b)+5b=80$

$50-2b+5b=80$

$50+3b=80$

$3b=30$

$b=10$

Since, a=25-b

a= 25-10

a=15.

So, 15 fluid ounces of 2% solution combined with 10 ounces of the 5% solution to create a 25-ounce mixture at 3.2% concentration of acid.

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3 years ago

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Paha777 [63]

Answer:

Step-by-step explanation:

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