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dalvyx [7]
3 years ago
8

Please help, and plz don't be saying this is the right answer if u dont know for sure.

Mathematics
1 answer:
zepelin [54]3 years ago
4 0

Answer:

135 degrees

Step-by-step explanation:

(8x-7)+(12x+57)=180

combine like terms

20x+50 = 180

subtract 50 on both sides

20x = 130

divide by 20

x = 130/20

x = 13/2

x = 6.5

cpq = 12x+57

cpq = 78 + 57

cpq = 135

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Hi, the answer is K but can anyone show why
dlinn [17]

Let's do 51 and 52.

51. The contrapositive has the same truth value as the original statement. That's opposed to the converse, which may or may not be true independent of the original statement.

The contrapositive of IF P THEN Q is IF not Q THEN not P.  They're equivalent.  Here that's If the cat is not female then it is not tricolor.

Answer: C

52.  

(x^3)^{(4-b^2)}=1

x^{3(4-b^2)} = 1

For the statement to be true, the exponent must be zero:

3(4-b^2) = 0

b^2 = 4

b = \pm 2

Both positive 2 and negative 2 have a square of 4.

Answer: K

By the way, usually we assume 0^0=1 so the restriction that x \ne 0 isn't really necessary.  Think of the definition of a polynomial or the binomial expansion:

\displaystyle f(x)=\sum_{k=0}^n a_k x^k

\displaystyle(x+y)^n=\sum_{k=0}^n {n \choose k} x^{k}y^{n-k}

For these common equalities to work when x=0 we need to define 0^0=1


3 0
4 years ago
1 lapin a vu 6 éléphants en allant à la rivière. Chaque éléphant a vu 2 singes aller vers la rivière. Chaque singe tient 1 perro
Stolb23 [73]

Answer:

  • <u><em>31 animals</em></u>

Explanation:

The question is in French language. The translation to English is:

<em>1 rabbit saw 6 elephants while going to the river. Each elephant saw 2 monkeys go towards the river. Each monkey holds 1 parrot in its hands.</em>

<em>How many animals are going to the river?</em>

<em />

<h2>Solution</h2>

<em />

Animal       amount

Rabbit            1

Elephants      6 (the rabbit saw 6 elephants)

Monkeys:       6 × 2 = 12 (2 monkeys per elephant)

Parrots:          12 × 1 = 12 (1 parrot per monkey)

                     =============================

Total:             1 + 6 + 12 + 12 = 31 animals ← answer

4 0
3 years ago
What is the value of the expression: 2/10 ÷ 5/4?<br> 1/50<br> 4/10<br> 8/50<br> 1/2
lana66690 [7]

Answer:

8/50

Step-by-step explanation:

2/10 x 4/5 = 8/50

Hope that helps!

8 0
3 years ago
Read 2 more answers
Solve the following equation -2x + 4 = 2 (4x - 3) -3 (-8 + 4x)<br> a.7<br> b.2<br> c.-7<br> d.3
spin [16.1K]
It would be B I think
4 0
4 years ago
How many elements are in the set {whole numbers between 3 and 15}?
densk [106]
It is 11 elements :)
6 0
3 years ago
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