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olasank [31]
3 years ago
5

Solve using substitution. 3x + 8y = 19 y = 2 ( , )

Mathematics
2 answers:
Kobotan [32]3 years ago
8 0
X=1, (1,2) is the answer
satela [25.4K]3 years ago
4 0
3x + 8(2) = 19, 3x + 16= 19 , 3x=3 , x =1
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What is the distance between (-5,6) and (4, 2)?
Sergeu [11.5K]

Answer:

9.85 units

Step-by-step explanation:

Let the distance between given points be d.

\therefore \: d =  \sqrt{ {( - 5 - 4)}^{2}  + (6 - 2)^{2} } \\  \hspace{16 pt} =  \sqrt{ {( - 9)}^{2}  + (4)^{2} }  \\  \hspace{16 pt} =  \sqrt{ {81}  + 16 }  \\  \hspace{16 pt} =  \sqrt{97 } \\  \hspace{16 pt}=  9.8488578 \\  \red{ \bold{ \therefore \: d =9.85 \: units }}\\

4 0
3 years ago
What expressions are equivalent to 7^3 * 7^x
solong [7]

Answer:

The question = (7^3)*(7^x)

When multiplying two exponents with the same base, all you do is add the exponents together and keep the same base

Therefore,

(7^3)*(7^x) = 7^(3+x)

Step-by-step explanation:

7^3+x is the answer

3 0
3 years ago
A store bought jeans at a cost of $40 a pair. Select all the statements that are true.
Firlakuza [10]
The answer is B. If the price is marked up 25%, the selling price will be $50.
4 0
4 years ago
Read 2 more answers
Help 15 points!!!!!!!!!!!!!!!!!!!!!
Svetllana [295]

Answer:

see explanation

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan A = \frac{opposite}{adjacent} = \frac{BC}{AC} = \frac{7}{8} , then

∠ A = tan^{-1} (\frac{7}{8} ) ≈ 41° ( to the nearest degree )

The sum of the angles in the triangle = 180° , then

∠ B + 41° + 90° = 180°

∠ B + 131° = 180° ( subtract 131° from both sides )

∠ B = 49°

Using Pythagoras' identity in the right triangle

AB² = BC² + AC² = 7² + 8² = 49 + 64 = 113 ( take square root of both sides )

AB = \sqrt{113} ≈ 10.6 ( to the nearest tenth )

3 0
3 years ago
How area tables, graphs, and equations helpful when you work with proportions
Scorpion4ik [409]
To help answer the questions
3 0
4 years ago
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