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masya89 [10]
3 years ago
6

Angle 4=x+30 and angle 2=2x+15. Find the measure of angle 4

Mathematics
1 answer:
kvasek [131]3 years ago
6 0

9514 1404 393

Answer:

  ∠4 = 45°

Step-by-step explanation:

Angles 1, 2, and 4 are all congruent.

  ∠4 = ∠2

  x +30 = 2x +15

  15 = x . . . . . . . . . . . . . subtract x+15

  x + 30 = 45 = ∠4

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If the 3rd and 9th term of an ap are 4 and -8 respectively then which term of AP is zero​
Anon25 [30]

Answer:

fifth term

Step-by-step explanation:

The n th term of an AP is

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Given a₃ = 4 and a₉ = - 8 , then

a₁ + 2d = 4 → (1)

a₁ + 8d = - 8 → (2)

Subtract (1) from (2)

6d = - 12 ( divide both sides by 6 )

d = - 2

Substitute d = - 2 into (1)

a₁ + 2(- 2) = 4

a₁ - 4 = 4 ( add 4 to both sides )

a₁ = 8

Thus equating the n th term formula to zero and solving for n

8 - 2(n - 1) = 0 ( subtract 8 from both sides )

- 2(n - 1) = - 8 ( divide both sides by - 2

n - 1 = 4 ( add 1 to both sides )

n = 5

The fifth term is equal to zero

8 0
2 years ago
Which equation is an identity?
Sav [38]

Answer:

Equation 3

Step-by-step explanation:

An identity is, simply put, an equation that is always true. 1 = 1, 2 = 2, and x = x are all examples of identities, as there's no case in which 1 ≠ 1, 2 ≠ 2, and x ≠ x. Essentially, if we can manipulate and equation so that we end up with the same value on either side, we've found an identity. Let's run through and try to solve each of these equations to see which one fulfills that condition:

8 - (6v + 7) = -6v - 1

8 - 6v - 7 = -6v - 1

1 - 6v = -6v - 1

1 = -1

This is clearly untrue. Moving on to the next equation:

5y + 5 = 5y - 6

5 = -6

Untrue again. Solving the third:

3w + 8 - w = 4w - 2(w - 4)

2w + 8 = 4w - 2w + 8

2w + 8 = 2w + 8

If we created a new variable z = 2w + 8, we could rewrite this equation as

z = z, <em>which is always true</em>. We can stop here, as we've now found that equation 3 is an identity.

4 0
3 years ago
Determine if 27/44 is a rational number or not.
kati45 [8]

Answer:

rational

Step-by-step explanation:

A rational number can be expressed in the form

\frac{a}{b} ← where a and b are integers

Given

\frac{27}{44} ← where 27 and 44 are both integers, then it is a rational number

7 0
3 years ago
Read 2 more answers
I need help on this
Lena [83]

Answer:

X=3.5

Step-by-step explanation:

AD = 4+3 = 7
ED = X
that is the ADE triangle


AB= 4
CB = 2
this is the ABC triangle
because the A angle shares the same triangles
ED /CB = AD/ AB
X/2 = 7/4
by multiplying all of the equation by 2 to get rid of the 2 under the x

X= 7/2 which is 3.5
so X= 3.5

3 0
2 years ago
Read 2 more answers
What is 5x23x2 using any property
____ [38]

Answer:

230

Step-by-step explanation:

First, you multiply 5 x 23. You'll get 115 as your answer. Multiply 115 x 2, and you'll get 230 as your answer.

4 0
3 years ago
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