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Korolek [52]
3 years ago
8

Please help! this one keeps getting me.

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
3 0

Answer:

C.  √16,200 feet

Step-by-step explanation:

According to Pythagorean theorem

c^2 = a^2 + b^2

Home First and Third is formed a right triangle with 2 equal sides = 90 ft

so

c^2 = 90^2 + 90^2

c^2 = 8100 + 8100

c^2 = 16,200

c = √16,200

Answer

C.  √16,200 feet

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Andrea has a savings account with $80 that earns 2% interest per
lianna [129]

Answer:

After 10 years, she will has $96 in her bank.

Step-by-step explanation:

It is given that Andrea's saving account is $80 and earns 2% interest per year as a <em>S</em><em>i</em><em>m</em><em>p</em><em>l</em><em>e</em><em> </em><em>I</em><em>n</em><em>t</em><em>e</em><em>r</em><em>e</em><em>s</em><em>t</em><em> </em>(Not Compounded). Using simple interest formula, Interest = (P×R×T)/100 where <em>P</em> is the <em>principal</em>, <em>R</em> is the <em>interest rate</em> and <em>T</em> is <em>number of years</em><em> </em>:

I =  \frac{p \times r \times t}{100}

P = $80

R = 2%

T = 10 years

I =  \frac{80 \times 2 \times 10}{100}

I =  \frac{1600}{100}

I = 16

It is given that the interest amount is $16. So the total amount she has after 10 years in the bank is $96 :

interest amount = $16

principal = $80

total = $16 + $80

= $96

8 0
2 years ago
Which description does not guarantee that a trapezoid is isosceles??
jasenka [17]

Answer:

Congruent bases does NOT guarantee that a trapezoid is isosceles.

8 0
3 years ago
A collection of nickels and dimes is worth $9.45. If the number of dimes is doubled, the value is
eduard

Answer:

The number of nickels is 45 and the number of dimes is 72.

Step-by-step explanation:

Let

x ----> number of nickels

y ----> number of dimes

Remember that

1\ nickel=\$0.05

1\ dime=\$0.10

so

0.05x+0.10y=9.45 ------> equation A

0.05x+0.10(2y)=16.65

0.05x+0.20y=16.65 ------> equation B

<em>Solve the system by substitution</em>

we have

0.05x+0.10y=9.45 ------> equation A

0.05x+0.20y=16.65 ------> equation B

Multiply both equations by 100 both sides

5x+10y=945 ---->5x=945-10y --> equation C

5x+20y=1,665 ----> equation D

substitute equation C in equation D

(945-10y)+20y=1,665

solve for y

945+10y=1,665

10y=1,665-945

10y=720

y=72\ dimes

Find the value of x

5x=945-10y

5x=945-10(72)

5x=225

x=45\ nickels

<em>Alternative Method</em>

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

the solution is the point (45,72)

therefore

The number of nickels is 45 and the number of dimes is 72.

7 0
3 years ago
Maria and her friends ate 5/8 of the 16 oranges that were at Maria's house. which is a reasonable answer for 5/8 x 16? please he
neonofarm [45]

Answer:

10

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
The second term of an arithmetic sequence is -39. The rule a, = a -1 + 12 can be used to find the next term of the
siniylev [52]

Step-by-step explanation:

the first one is the correct one

a, = -51+12(n-1)

a(2) = -51+12(2-1)=-39

I hope this helps

Im sure from the answer

but I couldnt explain it exactly

4 0
3 years ago
Read 2 more answers
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