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4 years ago

Solve the following system of equations using the substitution method. x=2y2x+5y=9

Mathematics

1 answer:

rodikova [14]4 years ago

4 0

Answer:

x=2, y=1. (2, 1).

Step-by-step explanation:

x=2y

2x+5y=9

-------------

2(2y)+5y=9

4y+5y=9

9y=9

y=9/9

y=1

x=2(1)=2

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stepladder [879]

Answer:

1. 24 quarts. 2. 85 seconds.

Step-by-step explanation:

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if 3/3 are in 1 cup, then 12/3 are in 4 cups.

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3 years ago

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3 years ago

Multiply (2.5x10^-10) (7x10^-6)

serious [3.7K]

We want to multiply $2.5\cdot10^{-10}$ by $7\cdot10^{-6}$ .

The numbers are written in scientific notation. So we expect the answer also to be in scientific notation.

the multiplication of the 10's, using the exponents rule is :

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the multiplication of the other 2 numbers is:

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(we write the number so that it has only one digit to the left of the decimal point).

Thus,

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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Rama09 [41]

Answer:

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Step-by-step explanation:

Anyway angles that apply includes: 55 and 70

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4 years ago