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3 years ago

Definitions need to be proven true or false

Mathematics

2 answers:

Digiron [165]3 years ago

5 0

Is that a fact or question?

Yuri [45]3 years ago

5 0

Answer:

The answer is false

Step-by-step explanation:

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When 4a- a x 3a + 7a is simplified it is equivalent to?

s2008m [1.1K]

Answer:

-3a^2+11a

Step-by-step explanation:

8 0

3 years ago

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Which graph represents the solution to this system of inequalities? y 2x-4

Lorico [155]

Answer:

where's the graph??? .......

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3 years ago

WILL MARK B! Please I need help I have a quiz

MArishka [77]

Answer:

a) 2x² - x + 3 = x(2x + 1) - 2x

<=> 2x² - x + 3 = 2x² + x - 2x

<=> 3 - x = - x

<=> 3 = 0

=> no solution

b) x/2 - x/3 - x/4 = 1/12

$\frac{6x}{12} - \frac{4x}{12} - \frac{3x}{12} = \frac{1}{12} \\ \\ \frac{ - x}{12} = \frac{1}{12} \\ \\ = > - x = 1 \\ \\ \\ < = > x = 1$

=> the euqation has the solution x = 1

c) |x - 5| = 2|x|

=> x - 5 = 2x

or x - 5 = -2x

<=> x = -5

or 3x = 5

<=> x = -5

x = -5or x = 5/3

d) defined conditions: 2 - x 》 0

<=> x 《 2

we have:

$\sqrt{x + 4} = 2 - x \\ < = > x + 4 = (2 - x) {}^{2} \\ < = > x + 4 = {x}^{2} - 4x + 4 \\ < = > {x}^{2} - 5x = 0 \\ < = > x(x - 5) = 0 \\$

<=> x = 0 (because x 《 2)

$\sqrt{5} = \frac{1}{25 {}^{x} } \\ = > 5 = \frac{1}{25 {}^{2x} } \\ < = > 5.25 {}^{2x} = 1 \\ < = > 5.5 {}^{4x} = 1 \\ < = > 5 {}^{4x + 1} = 1 \\ = > 4x + 1 = 0$

<=> x = -1/4

3 0

3 years ago

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Write -64.25 as a mixed number. -64.25 as a mixed number

gogolik [260]

Answer:

-64 1/4

Step-by-step explanation:

0.25 is the same as 1/4.

-64.25 = -64 1/4

5 0

2 years ago

State if the triangles in each pair are similar. If so, State how you know they are similar and complete the similarity statemen

Sidana [21]

Answer: a) similar, SSS similarity

Step-by-step explanation:

ΔLSR sides in order from least to greatest are: 24, 33, 36

ΔLNM sides in order from least to greatest are: 112, 154, 168

If the triangles are similar then their corresponding sides will be proportional

$\dfrac{LS}{LN}=\dfrac{SR}{NM}=\dfrac{LR}{LM}\\\\\\\\\\\dfrac{LS}{LN}=\dfrac{24}{112}\quad \rightarrow \dfrac{3}{14}\\\\\\\dfrac{SR}{NM}=\dfrac{33}{154}\quad \rightarrow \dfrac{3}{14}\\\\\\\dfrac{LR}{LM}=\dfrac{36}{168}\quad \rightarrow \dfrac{3}{14}$

Their corresponding sides are proportional so

ΔLSR ≅ ΔLNM by Side-Side-Side Similarity Theorem

8 0

3 years ago