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ziro4ka [17]
4 years ago
12

PLEASE HELP!!!

Mathematics
1 answer:
Nuetrik [128]4 years ago
3 0

Answer:

+2Na

Step-by-step explanation:

its like algebra kinda when you have a 3y or 2x your Na ion is multiplied by 2 becoming 2Na

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Mr.marichal has quarters ,dimes,and pennies in a jar.he has twice as many quarters as oennies.he also has 5 more dimes than penn
liberstina [14]

He has 20 quarters, 15 dimes and 10 pennies.

Step-by-step explanation:

Let,

Quarters = x

Dimes = y

Pennies = z

We know that,

A quarter is 25 cents, dime is 10 cents and penny is 1 cent.

Total amount = $6.60 = 6.60*100 = 660 cents

According to given statement;

25x+10y+z=660   Eqn 1

x=2z    Eqn 2

y=z+5   Eqn 3

Putting these values of x and y in Eqn 1

25(2z)+10(z+5)+z=660\\50z+10z+50+z=660\\61z=660-50\\61z=610\\

Dividing both sides by 61;

\frac{61z}{61}=\frac{610}{61}\\z=10

Putting z=10 in Eqn 2

x=2(10)\\x=20

Putting z=10 in Eqn 3

y=10+5\\y=15

He has 20 quarters, 15 dimes and 10 pennies.

Keywords: linear equations, substitution method

Learn more about linear equations at:

  • brainly.com/question/10978575
  • brainly.com/question/11025333

#LearnwithBrainly

5 0
3 years ago
SOMEONE PLEASE HELP ME WITH THIS!!!!! ITS GEOMETRY
Fudgin [204]

Answer:

KG = 7 (A)

m KIH = 28 (B)

m JIH = 96 (D)

m HKI = 68 (B)

m KJI = 84 (C)

Step-by-step explanation:

Notice that the triangle HKJ is identical to HIJ. Since there are lines drawn to each other and both triangles are identical, the lines KG and GI are the same. This means that it is 7.

The triangle KGJ is identical with IGH. Using the recognise angle property, we know that angle JKI is the same as KHI. This means that it is 28.

Angle JIH is the same as angle JKH. Since JKH is 180 - (KHI or 84), we know that the angle JIH is 96.

We can find angle HKI by subtracting 96 by 28 because we know that angle HKI is the same as JIH. This gives us 96-2 8 = 68.

Angle KJI is the same as KHI which is 84. Therefore, KJI is also 84.

5 0
3 years ago
Thea has a key on her calculator marked X. If an integer is displayed, pressing theX key chops off the first digit and moves it
Irina-Kira [14]

Step-by-step explanation:

jjsjdhhdhdhdhhfhdnjjdjdhshdsh

6 0
3 years ago
I need help can you help
saveliy_v [14]

Answer:

the awnser is 30

Step-by-step explanation:

mario and peach equal the same, so you would have to do 36÷3 and that equals 12, so then you look at mario divided by toad, and you would do 12÷2 to get 6, so toad would be 6, and that make bowser 0. so it would be 12+0+12+6=30

8 0
3 years ago
What is the height of the antenna?
ira [324]

Answer:

14 feet.

Step-by-step explanation:

Use the tangent function:

tan\alpha = \frac{opposite}{adjacent}

a = length of antenna:

tan\70 = \frac{a}{15}

a = 15tan\70

a = 14.09538931 ≈ 14

7 0
3 years ago
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