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3 years ago

Help please geometry, show all work!! Thanks :-)

Mathematics

1 answer:

snow_lady [41]3 years ago

6 0

Answer:

BC = 20

Step-by-step explanation:

If all angles are the same then all the sides are the same; therefore, BC = AC.

Set up the equations to solve for y

-y + 23 = 6y + 2; add y to both sides

23 = 7y + 2; subtract 2 from both sides

21 = 7y; divide by 7

y = 3; now use this to substitute into term for BC = 6y + 2 = 6(3) + 2 = 18+2 = 20

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For three consecutive years, Sam invested some money at the start of the year. The first year, he invested x dollars. The second

nikitadnepr [17]

Year Sam Sally1: X (3/2)X-10002: (5/2)X-2000 2X-15003: X/5+1000 X/4+1400Total 37X/10-1000 15X/4-1100
Since their investments are known to be equal, we equate the two totals and solve for X.37X/10-1000=15X/4-1100(150-148)X/40 = 1100-1000X/20=100X=2000
So Sam invested $2000 the first year.Sally invested X/4+1400=1900 in the last year.

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3 years ago

Prav is converting £257 into $. He knows that £1 = €1.11 and €1 = $1.22. How many $ will Prav get? Give your answer to 2 dp.

Ostrovityanka [42]

Answer:

$348.03

Step-by-step explanation:

£257 = €1.11 * 257

£257 = €285.27

€285.27 = $1.22 * 285.27

€285.27 = $348.0294

Round to 2 dp, $348.03

5 0

3 years ago

-10+square root of x+8 = -4 what is the solution of the equation

dezoksy [38]

$-10 \sqrt{x+8} =-4 \\ \sqrt{x+8}= \frac{-4}{-10} \\ x+8=(\frac{4}{10})^{2} \\ x=(\frac{4}{10})^{2}-8 \\ x=-7.84$

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3 years ago

What’s 3.9007 as a whole number

Kay [80]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Subtract 3a(a + b + c) – 2b(a – b + c) from 4c(–a + b + c). Please do not just tell the answer, I need to know how to solve this

riadik2000 [5.3K]

Answer:

-3a² - ab - 7ac - 2b² + 6bc + 4c²

Step-by-step explanation:

Step 1: Distribute

3a² + 3ab + 3ac - 2ab + 2b² -2bc

Step 2: Combine like terms

3a² + ab + 3ac + 2b² - 2bc

Step 3: Distribute again

-4ac + 4bc + 4c² - (3a² +ab + 3ac + 2b² -2bc)

Step 4: Combine like terms again

-3a² - ab - 7ac - 2b² + 6bc + 4c²

And you have your final answer.

3 0

3 years ago