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3 years ago

I’m not very good at these so someone help me out :,)

Mathematics

2 answers:

Yakvenalex [24]3 years ago

7 0

Answer:

( -4, 1 )

Step-by-step explanation:

( 4, 1 ) starts in quadrant 1. ( +, + )

When reflected over the y-axis it moves to quadrant 2. ( -, + )

Lilit [14]3 years ago

6 0

Answer:

-4,-1

i have to put 20 character so here is 20 characters

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Select all choices that describe rectangles with same area that are NOT congruent.

pickupchik [31]

B,E,F sorry if I’m wrong

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2 years ago

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Logarithm 2. The alkalinity of a fluid (pH) can be modeled in terms of its hydrogen ion concentration (H^+,measured in moles/lit

makkiz [27]

ok. We are given the following equation:

$ph=-\log (H)$

Where:

$\begin{gathered} P=\text{ alkalinity} \\ H=\text{ hydrogen ion concentration} \end{gathered}$

Since we are asked to determine "H" we will solve for "H" in the equation. To do that we will first multiply both sides by -1:

$-ph=\log (H)$

Now, we will use the following property of logarithms:

$\log _aB=c\rightarrow B=a^c$

Applying the property and having into account that:

$\log (H)=\log _{10}(H)$

We get:

$10^{-pH}=H$

Now we substitute the given value of "pH = 4.5":

$10^{-4.5}=H$

Solving the operation:

$0.000032=H$

Therefore, the hydrogen ion concentration of the fluid is 0.000032

7 0

9 months ago

A shopkeeper bought a purse for rupees 240 and sold it for rupees 220 find his loss or profit in percent

ANEK [815]

Answer:

8 1/3 %

Step-by-step explanation:

Since he bought for 240 and sold for 220, decrease is 20 Rupees.

20/240 = 1/12

100/12 = 8.33333 (Repeated)

0.33333 (repeated) = 1/3

8 1/3 %

Hope this helps!

5 0

2 years ago

Find the slope plz i have no motivation to do anyting

Dmitriy789 [7]

Answer:

thats an issue

Step-by-step explanation:

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2 years ago

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Please Answer ASAP! Will give Brainliest to person who is fast and right! Thxx

andrew11 [14]

Answer: AE = 120.83 m DE= 148.66 m

The perimeter of the pentagon is 699.49

Sketch attached.

Step-by-step explanation: First we have to imagine the shape of the pentagon. In order to satisfy the requirement "that E is 50 m from the side AB and 30 m from the side BC," <em><u>this must be a concave pentagon. </u></em>

To determine the lengths of sides AE and DE, subtract the given distances of E from the lines, and use those values in the Pythagorean Theorem.

AE: $110^{2}+50^{2}=14600$ $\sqrt{14600}=120.8304597$

DE: $100^{2}+110^{2}=22100$ $\sqrt{22100}=148.6606875$

Add those lengths and the remaining sides of the "rectangle shown below" to calculate the perimeter.

280+150+120.83+148.66= 699.49

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3 years ago