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2 years ago

Use subtraction to check addition problems 391+124=551

Mathematics

1 answer:

son4ous [18]2 years ago

3 0

Answer:

391+124=\=551

Step-by-step explanation:

subtract either the 124 or 391 from both sides.

391=427 which means they are not equal. so it has no solution.

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Given: circle k(O), diameter US, measure of arc RU=50, measure of arc UT=30

sleet_krkn [62]

Answer:

angle RUS = 65 degrees

angle STU = 90 degrees

Step-by-step explanation:

(a) find angle RUS

Given arc RU = 50 degrees, so angle RSU = 50/2 = 25 degrees

Since US is the diameter,

angle URS is a right-angle.

Consider triangle RUS,

sum of angles of a triangle = 25+90+RUS = 180

solve for

RUS = 180 - 25 - 90 = 65 degrees.

(b) Find STU

All diameters span a right angle at the circumference,

since we're given US is a diameter, this means that

angle STU is a right angle.

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2 years ago

What is 2x-{2-[2(x-2)-(2-x)]}=0

Ludmilka [50]

$2x-(2-(2(x-2)-(2-x)))=0\\
2x-(2-(2x-4-2+x))=0\\
2x-(2-(3x-6))=0\\2x-(2-3x+6)=0\\
2x-(-3x+8)=0\\
2x+3x-8=0\\
5x=8\\
x=\dfrac{8}{5}$

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3 years ago

This is hard and I need some help

aliina [53]

Answer:

Step-by-step explanation:

Answer attached.

Hope it helps ^_^

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2 years ago

2.159e45 in scientific notation please help

aniked [119]

2.159 • 10⁴⁵

you move the decimal point until you get a one digit decimal.

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2 years ago

Suppose an individual wants to have exactly $400,000 available for her child's education. (a) Find the amount that would have to

Airida [17]

Answer: a) $135,838.21 b) $46,130.05

Step-by-step explanation:

$A=P\cdot e^{rt}$

A: accrued amount (balance)
P: principal (initial amount invested)
r: interest rate (in decimal form)
t: time

(a) Given:

A = 400,000
P = unknown
r = 12% = 0.12
t = 9

$400,000=P\cdot e^{(0.12)(9)}\\\\400,000=P\cdot e^{1.08}\\\\\dfrac{400,000}{e^{1.08}}=P\\\\\large\boxed{135,838.21}$

(b) Given:

A = 400,000
P = unknown
r = 12% = 0.12
t = 18

$400,000=P\cdot e^{(0.12)(18)}\\\\400,000=P\cdot e^{2.16}\\\\\dfrac{400,000}{e^{2.16}}=P\\\\\large\boxed{46,130.05}$

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3 years ago