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3 years ago

Please help(: I’ll be posting more I just wanna pass

Mathematics

1 answer:

Agata [3.3K]3 years ago

4 0

Answer:

It's y = (5)(0.2)^x

_____________

Step-by-step explanation:

Exponential functions have a standard form of ab^x

Where a is the starting value, and b is the exponential growth or decay.

Because the numbers are getting smaller and smaller, it is a decay so b must be less than one.

We can eliminate the first choice because when x is 1, y is 1. If this where the equation we would get (5) (1/2) ^ 1 = 5 × 1/2 = 2.5 ≠ 1.

So the answer must be the second choice.

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The temperature on Wednesday evening was -5 Fahrenheit. The temperature decreased another 8 degrees throughout the night. What w

katovenus [111]

Answer:

The Temperature on Thursday morning will be -13° Fahrenheit.

Step-by-step explanation:

Given:

Temperature on Wednesday evening = -5 Fahrenheit

Temperature decreased Throughout the night = 8 degrees

We need to find the Temperature on Thursday morning.

Now we know that;

The temperature decreased means the temperature went more below the current temperature.

So To calculate Temperature on Thursday morning we will Subtract the temperature which got decreased by the temperature noted on Wednesday evening.

framing in equation form we get;

Temperature on Thursday morning = $-5-8 =-13\°\ Fahrenheit$

Hence The Temperature on Thursday morning will be -13° Fahrenheit.

7 0

3 years ago

A. 1 1/2 B.-3 3/8 C.3 3/8 D. -1 1/2

adell [148]

$\implies {\blue {\boxed {\boxed {\purple {\sf { \: A. \:1 \frac{1}{2} }}}}}}$

$\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}$

$- 2 \frac{1}{4} \div ( - 1 \frac{1}{2} )$

➼ $\: \frac{ - 9}{4} \div( \frac{ - 3}{2} )$

➼ $\: \frac{ - 9}{4} \times \frac{ - 2}{3}$

➼ $\: \frac{ - 9 \times - 2}{4 \times 3}$

➼ $\: \frac{18}{12}$

➼ $\: \frac{3}{2}$

➼ $\: 1 \frac{1}{2}$

$\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}$

3 0

3 years ago

If 4/3 liters of water are enough to water 2/5 of the plants in the house, how much

N76 [4]

Answer:

Based on the equation calculated, the water that is necessary to water all the plants in the house is 3 1/3 liters.

Step-by-step explanation:

3 0

2 years ago

Find the equation of a circle in standard form that is tangent to the line x = -3 at (-3, 5) and also tangent to the line x = 9.

Sedaia [141]

Answer:

(x -3)² +(y -5)² = 36

Step-by-step explanation:

The center is on the vertical line halfway between the given vertical lines, so is at x=3. It is also on the horizontal line through the point (-3, 5), so is at y=5. The center is 9-3=6 from either tangent line, so this is the radius.

For center (h, k) and radius r, the circle's equation is ...

(x -h)² +(y -k)² = r²

For (h, k) = (3, 5) and r=6, the equation is ...

(x -3)² +(y -5)² = 36 . . . . . . . . does not match any choice written here

6 0

3 years ago

PLEASE HELP! WILL MARK BRAINLIEST

omeli [17]

v - 6 ≥ 4

+6 +6

v ≥ 10

Graph: 10 -----------------→ the dot at 10 is filled in because of the "equal to" symbol

********************************************************************************************************

-5x < 15

$\frac{-5x}{-5} > \frac{15}{-5}$ divided by a negative so the symbol flipped

x > -3

Graph: -3 o------------------→ the dot at -3 is NOT filled in because it's NOT "equal to"

********************************************************************************************************

3k > 5k + 12

-5k -5k

-2k > 12

$\frac{-2k}{-2} < \frac{12}{-2}$ divided by a negative so the symbol flipped

k < -6

Graph: ←------------o -6 the dot at -6 is NOT filled in because it's NOT "equal to"

********************************************************************************************************

2t ≤ 4 or 7t ≥ 49

$\frac{2t}{2} \leq\frac{4}{2}$ or $\frac{7t}{7} \geq \frac{49}{7}$

t ≤ 2 or t ≥ 7

Graph: ←------- 2 7 ---------→ the dots at 2 and 7 are filled in

********************************************************************************************************

| n + 2 | = 4

n + 2 = 4 or n + 2 = -4

-2 -2 -2 -2

n = 2 or n = -6

Answer: n = {2, -6}

********************************************************************************************************

| 2x - 7 | > 1

2x - 7 > 1 or 2x - 7 < -1

+7 +7 +7 +7

2x > 8 or 2x < 6

$\frac{2x}{2} > \frac{8}{2}$ or $\frac{2x}{2} < \frac{6}{2}$

x > 4 or x < 3

Graph: ←----------o 3 4 o------------→

********************************************************************************************************

A = {1, 2, 3, 4, 5, 6, 7, 8, 9} B = {2, 4, 6, 8}

A U B = {1, 2, 3, 4, 5, 6, 7, 8, 9} union combines both sets

A ∩ B = {2, 4, 6, 8} intersection includes only those that are in BOTH sets

********************************************************************************************************

P = {1, 5, 7, 9, 13} R = { 1, 2, 3, 4, 5, 6, 7} Q = {1, 3, 5}

P ∩ R ∩ Q = {1, 5}

P ∩ R = {7} disregard 1 & 5 since they are already in P∩Q∩R

R ∩ Q = {3} disregard 1 & 5 since they are already in P∩Q∩R

P ∩ Q = { } disregard 1 & 5 since they are already in P∩Q∩R

P no intersection = {9, 13)

R no intersection = {2, 4, 6}

Q no intersection = { }

If you can't figure out how to draw it based on the information I provided, please see the attached diagram. Note: Usially, you would only identify P, Q, R. I identified the intersections so you would understand why those specific numbers are placed in the designated sections.

4 0

3 years ago