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3 years ago

Please help!! ill give brainliest!!! this is worth 30 points!!!!!!!!

Mathematics

1 answer:

Svetlanka [38]3 years ago

5 0

Answer: a. 45 = k

b. d/t = 45

c. d = 45t

Step-by-step explanation:

The constant of proportionality (k) equals y divided by x if it is a direct variation. In the given problem, y is represented by distance (d) and x is represented by time (t).

$a)\quad \dfrac{d}{t}=k\\\\\\.\qquad \dfrac{90}{2}=k\\\\\\.\qquad 45=k\\\\\\b)\quad \dfrac{d}{t}=k\\\\\\.\ \quad \dfrac{d}{t}=45\\\\\\c)\quad \text{multiply both sides by t:}\\.\qquad d=45t$

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Jeanette is painting A rectangle wall that is 10 feet long and 8 feet tall. There is a window that is 5 feet wide and 3 feet til

dimulka [17.4K]

10 × 8 = 80 squared feet
(wall space)

5 × 3 = 15 squared feet
(area of the window)

80- 15 = 65 squared feet
(the amount of area she will be painting on)

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3 years ago

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Can someone please help me on this I’m not sure if what I is the correct answer someone help

tia_tia [17]

Answer: you got it right, it is the one that is blue highlighted.

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4 years ago

Pls I need help

Lelu [443]

(1) A part to whole ratio compares different parts of the group to each others is true.

(2) the ratio 3:1 can also be written as 1 to 3 is false.

(3) A part to whole ratio can be written as a fraction, a decimal, and a percent is true.

(4) two term and three term ratios compare quantities measures in different units is false.

(1) A ratio has two parts, a numerator and a denominator.

Example: if we have 2 oranges and 3 apples in a fruit basket.

fruits ratio = 2:3

total fruits ratio = 5

fraction of orange = $\frac{2}{5}$

fraction of apple = $\frac{3}{5}$

This ratio compares a part of each fruit to the whole

Thus, a part to whole ratio compares different parts of the group to each others is true.

(2) The ratio 3:1 is written as $\frac{3}{1} =3$ .

Thus, the ratio 3:1 can also be written as 1 to 3 is false.

(3) the ratio 2:3, has the following fractions, decimal and percentage with respect to whole ratio;

fraction of 2 = $\frac{2}{5}$ , decimal = 0.4, percentage = 40%

fraction of 3 = $\frac{3}{5}$ , decimal = 0.6, percentage = 60%

Thus, a part to whole ratio can be written as a fraction, a decimal, and a percent is true.

(4) the units of the quantities compared have to be the same in order to find their ratios.

Thus, two term and three term ratios compare quantities measures in different units is false.

Learn more here:brainly.com/question/2284943

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3 years ago

The answer has to be a geometric proof. Thank you!

Mariulka [41]

Given data:

The given triangle in which AD is on perpendicular bisector on BC.

In triangle ABD and ACD.

$\begin{gathered} \angle ADB=\angle\text{ADC}=90^{\circ} \\ BD=CD(\text{given)} \\ AD=AD\text{ (common)} \\ \Delta ABD\cong\Delta ACD(\text{SAS)} \end{gathered}$

Simmilary triangle BED and triangle CED.

$\begin{gathered} \angle BDE=\angle CDE \\ BD=CD \\ ED=ED \\ \Delta BED\cong\Delta CED(SAS) \end{gathered}$

The fisr expression can be written as,

$\begin{gathered} \Delta ABD\cong\Delta ACD \\ \Delta\text{ABE}+\Delta BED\cong\Delta ACE+\Delta\text{CED} \end{gathered}$

Substitute CED in place of BED.

$\begin{gathered} \Delta ABE+\Delta CED\cong\Delta ACE+\Delta CED \\ \Delta ABE\cong\Delta ACE \end{gathered}$

Thus, the triangle ABE is congruent to trriangle ACE.

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1 year ago

olchik [2.2K]

Answer:

I got B

Step-by-step explanation

6 0

3 years ago

Please help!! ill give brainliest!!! this is worth 30 points!!!!!!!!​

Please help!! ill give brainliest!!! this is worth 30 points!!!!!!!!