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3 years ago

How many parts are needed to prove triangles are congruent?

2 answers:

8 0

Two triangles are congruent if and only if they have the same three sides and the same three angles. That does not mean that the triangles are in the same position. If there is a turn or flip you can match these triangles to see that in fact they are congruent.

If the sides are the same, then the conclusion is that they are congruent, but this does not always work with angles, that is, two triangles with the same angles might be congruent or might not if they have different sizes because, even though all angles match, one side can be larger than the other.

JulijaS [17]3 years ago

5 0

You need three parts but they can’t all be angles

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A gallon of apple juice is $7.A pack of eight 4.23 oz box apple juice is 2.39.Which is a better deal?

VikaD [51]

128 ounces in a gallon
The pack is 33.84 ounces in total

gallon for 7=18 cents per ounce
pack for 2.39 is .07 cents per ounce

So the pack is a better deal

4 0

3 years ago

Read 2 more answers

Tickets for a concert are $40 for main-floor seats and $25 for upper level seats. A total of 2000 concert tickets were sold. The

Tems11 [23]

Step-by-step explanation:

to show how many tickets were sold:

x = upper floor tickets

y = main floor tickets

x + y = 2000

to show total amount of revenue:

25x + 40y = 62,000

Finding answer using both equations:

x + y = 2000

multiply each side by 25

25x + 25y = 2000 × 25

25x + 25y = 50,000

25x + 40y = 62,000

25x + 25y = 50,000

-----------------------------------

15y = 12,000

^ this is column subtraction

^ this column subtraction is done to isolate y so we can work with one value rather than 2

15y = 12,000

divide each side by 15

12,000 ÷ 15 = 800

y = 800

x + y = 2000

x + 800 = 2000

x = 1200

Therefore 1200 upper-level tickets were sold

800 main floor tickets were sold

4 0

3 years ago

What does a markdown in math mean?

oee [108]

A markdown in math is basically a decrease in whatever numbers you are working with.

5 0

3 years ago

Qhat is the ratio of 6to 5

asambeis [7]

6:5 is the ratio #answerwithquality #BAL

3 0

3 years ago

For each of the following functions, (i) find the constant c so that f(x) is a pdf of a random variable X, (ii) find the cdf, F(

mel-nik [20]

Answer:

(a)

c=1/2

cdf is $F(x) = x^2$

Step-by-step explanation:

Remember that if $f$ is the pdf of a random variable X .

$\int\limits_{-\infty}^{\infty} f(x) \,dx = 1$

Then,

(a)

$\int\limits_{-\infty}^{\infty} 4xc \,dx = \int\limits_{0}^{1} 4xc \, d x = 2c = 1$

Therefore

c=1/2

and

$f(x)=2x$

then to compute the cdf, we have

$F(x) = P(X \leq x) = \int\limits_{-\infty}^{x} 2y \,dy = \int\limits_{0}^{x} 2y \, dy = x^2$

7 0

3 years ago