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3 years ago

9

Explain how you use substitution to solve a system of linear equations.

2 answers:

Marianna [84]3 years ago

7 0

The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.

lions [1.4K]3 years ago

7 0

Answer: Step 1 : First, solve one linear equation for y in terms of x .

Step 2 : Then substitute that expression for y in the other linear equation.

Step 3 : Solve this, and you have the x -coordinate of the intersection.

Step 4 : Then plug in x to either equation to find the corresponding y -coordinate.

Step-by-step explanation: MARK ME AS BRAINLIEST PLEASE PLEASE PLEASE!!!

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If EH = 76, calculate DI.

Montano1993 [528]

Answer:

DI = 38

Step-by-step explanation:

Δ EHC and Δ DIC are similar and ratios of corresponding sides are equal, that is

$\frac{DI}{EH}$ = $\frac{DC}{EC}$ , substitute values

$\frac{DI}{76}$ = $\frac{1}{2}$ ( cross- multiply )

2DI = 76 ( divide both sides by 2 )

DI = 38

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3 years ago

A student took a 20 question test. 16 of the questions were correct. What percent of the questions did the student get correct?

elena-14-01-66 [18.8K]

Answer:

80%

Step-by-step explanation:

16/20 = 0.80

80%

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algol [13]

Answer:

y = 8.5

Step-by-step explanation:

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3 years ago

You bought a winter coat for S48.75. The original price was $75. What percent of the original price did you pay for the coat?

enot [183]

Answer:

53.85%

Step-by-step explanation:

75-48.75= 26.25

26.25/48.75x100= 53.8461538462 Round 53.85%

Check Answer:

48.75 x 53.85%=26.251875 Round 26.25

48.75 + 26.25=75

Hence, the correct answer is 53.85%.

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2 years ago

Can You Help Me With This Please?

bearhunter [10]

Answer:

Step-by-step explanation:

Thats what i got but you still have to do the other 2 steps i am not sure how, but i hope that helps!

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3 years ago