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3 years ago

How do you work a 45-45-90 angle in math????? I have a test tomorrow and I would really appreciate if someone answered.

Mathematics

1 answer:

strojnjashka [21]3 years ago

4 0

Answer:

What do you mean work a 45-45-90 degree angle... could you provide a picture of what you need to learn.

Step-by-step explanation:

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Answer this please......

Brrunno [24]

Answer:

1). Option A

2). Option B

Step-by-step explanation:

Question 1

Rule for the dilation of a point by a scale factor 'k' is given by the rule,

(x, y) → (kx, ky)

By this rule image of point A when dilated by the scale factor = 1.25,

A(-12, -8) → A'[(-12 × 1.25), (-8 × 1.25)]

→ A'(-15, -10)

Option A will be the answer.

Question 2

Scale factor = $\frac{\text{Dimension or one side of the image}}{\text{Dimension or one side of the preimage}}$

From the figure attached,

Scale factor = $\frac{F'E'}{FE}$

= $\frac{4}{14}$

= $\frac{2}{7}$

Therefore, rule for the dilation of ABC to form image triangle A'B'C' will be,

(x, y) → $(\frac{2}{7}x, \frac{2}{7}y)$

Option B will be the answer.

8 0

3 years ago

There are some nickels, dimes, and quarters in a large piggy bank. For every 2 nickels there are 3 dimes. For every 2 dimes ther

rodikova [14]

Answer: a) Number of nickels, dimes, and quarters are 80, 120, 300 respectively.

b) The coins are worth of 91 dollars i.e. $91 in the piggy bank.

Explanation:

Since we have given that

For every 2 nickels there are 3 dimes ,

So, their ratio will be 2:3

and for every 2 dimes there are 5 quarters.\,

So, their ratio will be 2:5

Now, we'll first find the ratio of nickles to dimes to quarters i.e.

Nickle Dimes Quarters

2 3

2 5

So, it becomes ,

Nickle : Dimes : Quarters

2×2 : 3×2 : 3×5

4 : 6 : 15

Now, let the number of nickle be 4x

Let the number of dimes be 6x

Let the number of quarters be 15x

According to question,

$4x+6x+15x=500\\\\25x=500\\\\x=\frac{500}{25}=20$

So, number of nickels is given by

$4x=4\times 20=80$

Number of dimes is given by

$6x=4\times 20=120$

Number of quarters is given by

$15x=4\times 20=300$

As we know that

$1\ nickel=5\ cents\\\\1\ dime=10\ cents\\\\1\ quarter=25\ cents$

So, According to our question, we get

$80\times 5+120\times 10+300\times 25=400+1200+7500=9100\ cents\\\\1\ cent=0.01\ dollar\\\\9100\ cents=9100\times 0.01\ dollars=91\ dollars.$

Hence,

a) Number of nickels, dimes, and quarters are 80, 120, 300 respectively.

b) the coins are worth of 91 dollars i.e. $91 in the piggy bank.

7 0

3 years ago

Marie's dad drives an SUV that uses 2.5 litres of fuel for every 20 km driven. He drives to work 20 km each way, 5 days a week.

mash [69]

Answer: 12.5 litres

Step-by-step explanation:

The SUV takes 2.5 litres for every 20 km driven.

The trip to work is 20 km which means that going to work costs Marie's father 2.5 litres every day in fuel.

In a week, there are 5 working days.

The amount of fuel used per week is therefore:

= 2.5 * 5

= 12.5 litres

5 0

3 years ago

What is the value of x in the equation three-fifths x = negative 45? –75 –27 27 75

scoundrel [369]

Answer:

x = -75

Step-by-step explanation:

$\frac{3}{5}$ x = - 45 ( multiply both sides by 5 to clear the fraction )

3x = - 225 ( divide both sides by 3 )

x = - 75

8 0

2 years ago

Read 2 more answers

REWRITE THE EXPRESSION USING THE DISTRIBUTIVE PROPERTY

Sindrei [870]

The greatest common factor of both numbers is 6 so you would take out that 6 since both of those numbers can be multiplied by it. So, your answer would be 6(5x+1) and if you multiply that 6 back in, you will go back to the original equation.

8 0

4 years ago

Read 2 more answers