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3 years ago

Sarah says that 19 ÷ 9 equals 9 ÷ 4 because both are "2 R1." Show her mistake using decimal division

Mathematics

1 answer:

Viefleur [7K]3 years ago

4 0

Answer:

2.11, 2.25

Step-by-step explanation:

19/9

= 2.11

9/4

= 2.25

Hence the mistake is that both values are different as 19/9 is 2.11 and 9/4 is 2.24

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Eva8 [605]

Answer:

MN = 3

Step-by-step explanation:

The following are congruent to each other as each pair are tangents of a circle drawn from the same external point:

PQ = QJ = 1

JK = KL = 4 - 1 = 3

MN = ML

Thus, ML = KM - KL

ML = 6 - 3 = 3

Therefore, MN = ML = 3 (both are tangents drawn from the same external point, M.

5 0

3 years ago

3.8:(4c+3)=2:2 2/19<br><br>Please help me! I really appreciate it!

Sati [7]

Please note that in such questions, the ":" stands for ratio which in turn stands for divide. Thus, the given expression which is:

$3.8:(4c+3)=2:2\frac{2}{19}$ will become:

$\frac{3.8}{4c+3}= \frac{2}{2\frac{2}{19}}$ .....(Equation 1)

Now, we know that 3.8 can be rewritten as $\frac{38}{10}$ . Also, we know that the mixed fraction $2\frac{2}{19}$ can be re-written as:

$2\frac{2}{19}=2+ \frac{2}{19}= \frac{38+2}{19}= \frac{40}{19}$

Using the above two expressions in (Equation 1) we get:

$\frac{\frac{38}{10}}{4c+3}= \frac{2}{\frac{40}{19}}$

$\frac{\frac{38}{10}} {4c+3}= \frac{2\times 19}{40}= \frac{38}{40}$

Cross-multiplication gives:

$38(4c+3)=\frac{40\times 38}{10}$

$4c+3=4$ $4c=1$

$c=\frac{1}{4}$

Or c=0.25

Thus, we may write the value of c as either the decimal 0.25 or the fraction $\frac{1}{4}$ .

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3 years ago

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Consider vectors u = ⟨2, 1⟩ and v = ⟨4, –1⟩ with the angle between them equal to 40°. What are the scalar projections uv and vu?

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Answer: D. uv = 1.71 and vu = 3.16

Step-by-step explanation:

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3 years ago

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kirill115 [55]

Answer:

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Step-by-step explanation:

The width is 4 inches

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Answer:

$472.5

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10.5x

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