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3 years ago

Need help with number 20

Mathematics

1 answer:

svetoff [14.1K]3 years ago

5 0

Answer:

Step-by-step explanation:

Since we are given BC is congruent to DC and angle b and d are 90. We can prove that <C is congruent to itself by reflexive property of congruence. We can also you use linear pair theorem to prove <CDA is congruent to <CBE. Since they are right angles, we can prove that they are congruent by rt <s thm. Thus, we cna prove they are congruent by ASA. Hope it helps

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What’s the equation in vertex form?

pshichka [43]

Answer:

$\large\boxed{y=(x+5)^2-64}$

Step-by-step explanation:

$\text{The vertex form of equation}\ y=ax^2+bx+c:\\\\y=a(x-h)^2+k\\\\h=\dfrac{-b}{2a},\ k=f(h)\\\\\text{We have the equation:}\ y=x^2+10x-39\to x=1,\ b=10,\ c=-39.\\\\\text{Substitute:}\\\\h=\dfrac{-10}{2(1)}=\dfrac{-10}{2}=-5\\\\k=f(-5)=(-5)^2+10(-5)-39=25-50-39=-64\\\\\text{Finally:}\\\\y=1(x-(-5))^2-64=(x+5)^2-64$

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3 years ago

A glacier receded at a rate of 250 feet

bekas [8.4K]

Answer:3,500

Step-by-step explanation:

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2 years ago

Beginning with the equation x=11, write the new equation produced by subtracting 5 from both sides

skelet666 [1.2K]

Answer:

-5x=6

Step-by-step explanation:

What I did was subtract x by 5 since there is a 1 in front the x

Then subtract 11 by 5.

8 0

3 years ago

Please help me i have a hw

aalyn [17]

Answer:

1.B 2.H 3. A

Step-by-step explanation:

1. First, find out the percentage of people who voted for Mathematika in survey one.

The total amount of people who voted is 14+17+19, which equals 50. 17/50 people voted for Mathematika, 17/50 = 0.34.

To find out how many people out of 300 will vote for Mathematika, multiply the 0.34 by 300. 300 x 0.34 = 102, so 102 people will vote for Mathetika.

2. You use the same logic for number 2. 14+17+19+20+19+11 = 100, so 100 people voted in total. 34 people voted for Infinitus. 34/100 = 0.34. Multiply 0.34 by 750 to get 255 people will vote for Infinitus.

3. The mean = the average. To find the average, add up all of the numbers, then divide that number by the amount of numbers added together.

7+9+11+13+15 = 55

5 numbers were added together so you divide 55 by 5

55/5 = 11. The mean is 11

9+10+11+12+13 = 55

There were 5 numbers added together

55/5 = 11. Both the means were the same

4 0

3 years ago

$18, 000 at 9% compounded semiannually for 6 years

Eddi Din [679]

Answer: $30,525.87

Step-by-step explanation:

$A=P(1+\frac{r}{n})^n^t$

A = Amount

P = Principal

r = rate

n = number of times it is compounded

t = time

$A=18000(1+\frac{0.09}{2})^(^2^)^(^6^) \\A=30,525.87$

7 0

3 years ago