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PSYCHO15rus [73]
3 years ago
6

A student pulls out ten marbles: three were red, two were blue, and five were green. In the next handful, the

Mathematics
1 answer:
artcher [175]3 years ago
3 0

Answer:

21

Step-by-step explanation:

To get from 10 to 70, you multiply by 7. Just do the rest to all the other numbers, and red = 21.

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jeka57 [31]

Answer:

54

Step-by-step explanation:

The sum of given angles must be equal to 360°

3x° + 2x° + 90° = 360°

5x + 90 = 360

5x = 270 divide both sides by 5

x = 54

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他自己是我心目中最重要就是這樣啊。我們都會繼續
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3 years ago
I need help :,)
Dmitry_Shevchenko [17]

Answer:

add 17.50 to 8.75 you get 26.25

7 0
2 years ago
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You invested $ 7000 between two accounts paying 3 % and 5 % annual? interest, respectively. If the total interest earned for the
natita [175]

Answer:

In the first account was invested \$3,000  at 3%

In the second account was invested \$4,000  at 5%

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

First account

t=1 years\\ P=\$x\\ r=0.03

substitute in the formula above

I=x(0.03*1)

I=0.03x

Second account

t=1 years\\ P=\$(7,000-x)\\ r=0.05

substitute in the formula above

I=(7,000-x)(0.05*1)

I=350-0.05x

Remember that

The interest is equal to \$290

so

Adds the interest of both accounts

0.03x+350-0.05x=\$290

0.05x-0.03x=350-290

0.02x=60

x=\$3,000

therefore

In the first account was invested \$3,000  at 3%

In the second account was invested \$7,000-\$3,000=\$4,000  at 5%

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3 years ago
9+4x-5+12x-3x I am sooooo bad at math can I get some help please?!☹
Ghella [55]
13x+4
Combine like terms
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