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balandron [24]
3 years ago
6

Choose the algebraic expression that best matches this verbal description: "the sum of 3 and 7 times a number x

Mathematics
1 answer:
aniked [119]3 years ago
8 0

Answer:

b

Step-by-step explanation:

the sum of 3 and 7 is 3+7. then times x

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3.305 + 1.7 what's the sum? Also more questions are coming just doing a test
Paraphin [41]

  3.305

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  5.005

Line up the decimal points and add like you usually would add.

5.005 is the answer.

5 0
2 years ago
Given: AD = BC and AD || BC
bearhunter [10]

Answer:

ABCD is a parallelogram.

Step-by-step explanation:

A parallelogram is a quadrilateral that has two parallel and equal pairs of opposite sides.    

From the given diagram,

Given: AD = BC and AD || BC, then:

i. AB = DC (both pairs of opposite sides of a parallelogram are congruent)

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thus, AD || BC and AB || DC (both pairs of opposite sides of a parallelogram are parallel)

iii. < BAC = < DCA (alternate angle property)

iv. Join BD, line AC  and BC are the diagonals of the quadrilateral which bisect each other. The two diagonals are at a right angle to each other.

v. <ADC + < BCD + < DAB + < CBA = 360^{0}  (sum of angles in a quadrilateral equals 4 right angles)

Therefore, ABCD is a parallelogram.

4 0
3 years ago
What s 464657474+64736825483
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Answer:

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5 0
2 years ago
Which of the following are identities? Check all that apply. A. cot2x + 1 = csc2x B. tan2x = 1 - sec2x C. sin2x = 1 + cos2x D. s
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I'll assume those are squares.  We know D is an identity:

\sin^2 x + \cos ^2 x = 1

Dividing through by \sin ^2 x

1 + \cot^2 x = \csc^2 x

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\tan^2 x + 1 = \sec^2 x

Not quite B, wrong sign on tangent.  

C has the wrong sign on cosine squared as well.

Identities: A & D
4 0
3 years ago
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