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3 years ago

does anyone know this ?? pls help its a test !!! i'll give u brainliest and 15 points !! pls show work

Mathematics

1 answer:

saul85 [17]3 years ago

7 0

Answer:

DBC = 50 degrees

Step-by-step explanation:

180 - 80 = 100

2x = 100

divide by 2

x = 50

DBC = 50 degrees

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How do this problem?

Naily [24]

1/5(3x - 0.5) + 1/6= x/5 + 0.5
change decimals to fractions (0.5=1/2)

1/5(3x - 1/2) + 1/6= x/5 + 1/2
multiply 1/5 by each term in parentheses

(1/5*3x) + (1/5*-1/2) + 1/6= x/5 + 1/2
multiply within parentheses

3x/5 - 1/10 + 1/6= x/5 + 1/2

need a common denominator; all denominators go into 30

18x/30 - 3/30 + 5/30= 6x/30 + 15/30
combine like terms

18x/30 + 2/30= 6x/30 + 15/30
subtract 6x/30 from both sides

12x/30 + 2/30= 15/30
subtract 2/30 from both sides

12x/30= 13/30
multiply both sides by 30 to eliminate fractions

(12x/30)(30)= (13/30)(30)
12x= 13
divide both sides by 12

x= 13/12 or 1.083333

ANSWER: x= 13/12 or 1.083333

Hope this helps! :)

7 0

3 years ago

Read 2 more answers

Brianna bought a compact disk for $10. An instant rebate gave her a discount and she only had to pay $7.50 for the CD. What is t

svetoff [14.1K]

Answer:

25%

Step-by-step explanation:

The discount was $2.50. Dividing $2.50 by $10, we get 0.25, or 25%

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3 years ago

What is the sum of the interior angles of the polygon shown below

Ipatiy [6.2K]

Answer:

900

Step-by-step explanation:

The sum of the interior angles of a polygon with n sides is given by the formula:

$S=(n-2)180$

The polygon given has 7 sides. Substitute 7 for n. Thus:

$S=(7-2)180\\S=5(180)\\S=900$

The sum of the interior angles is 900 degrees.

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4 years ago

What is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each

LenKa [72]

${\bold{\red{\huge{\mathbb{QUESTION}}}}}$

what is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each

$\bold{ \red{\star{\blue{GIVEN }}}}$

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ARTICLES FOR 30K = 3

ARTICLES FOR 12.5K = 7-3= 4

$\bold{\blue{\star{\red{TO \: \: FIND}}}}$

Average cost of 7 articles

$\bold{ \green{ \star{ \orange{FORMULA \: USED}}}}$

$\red{AVERAGE = \frac{TOTAL \: COST}{ NUMBER \: OF\: ARTICLES }}$

$\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}$

$Average \: cost \: of \: 7 \: articles - > \\ \frac{(3 \times 30k) + (12 .5k \times 4)}{7} \\ \frac{90k + 50k}{7} \\ \frac{140k}{7} \\ \blue {Average \: cost \: of \: 7 \: articles - >} \\ 20k$

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3 years ago

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Answer:

Step-by-step explanation:

This is what I got in the calculator

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