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strojnjashka [21]
3 years ago
7

Calculate the area of each figure.

Mathematics
1 answer:
guapka [62]3 years ago
6 0

Answer:

230cm^{2}

Step-by-step explanation:

17*10=170

12*10*1/2=60

170+60=230

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a woman has $28,000. part is invested for one year in a certificate of deposit paying 7% interest, and the remaining amount in c
alexira [117]

Answer:

Amount invested at 7% = 16000

Amount invested at 9% = 12000

Step-by-step explanation:

Let x be the amount invested at 7% and y be the amount invested at 9%.

Since the total amount invested is $28000, therefore, we can set up the first equation as:

x+y=28000

Secondly, we are give that sum of two investments is $2200. Therefore, we can write the second equation as:

0.07x+0.09y=2200

Now we need to solve these two equations to get the values of x and y.

First of all, we multiply the second equation with 100 in order to get rid of decimal values.

(0.07x+0.09y)*100=2200*100\\7x+9y=220000

Let us use substitution method here. First of all we will solve for y from first equation and plug that into second equation.

y=28000-x

7x+9(28000-x)=220000\\7x+252000-9x=220000\\-2x=-32000\\x=16000

Therefore, amount invested at 7% is $16000 and amount invested at 9% is 28000-16000=$12000.

7 0
3 years ago
Y=arccos(1/x)<br><br> Please help me do them all! I don’t know derivatives :(
Fantom [35]

Answer:

Step-by-step explanation:

3 0
2 years ago
A motel in New Orleans charges $90 per day for double occupancy and $80 per day for single occupancy during off-season. If 80 ro
kkurt [141]

double occupancy room=x

single occupancy room=y

x + y =   80,    

90x + 80y = 6930

x=53

y=27

5 0
3 years ago
Evaluate the expression 43 + 2(3 − 2).
Vedmedyk [2.9K]

Answer:

It's 45, and it appears none of them are right.

Step-by-step explanation:

43 + (6 - 4)

43 + 2 =

45

Hope that helps!

4 0
3 years ago
Read 2 more answers
the scale on a map is 1 cm for every 400 km .If the Maine and Japan are 22 cm apart on the map, what is the distance between Mai
anyanavicka [17]
We know that 1 cm = 400 km
Therefore, 22 cm = x
Cross multiply:
(1)x = (400×22)
x = 8800
5 0
3 years ago
Read 2 more answers
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