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Mandarinka [93]
3 years ago
9

— 5х – 4у = -8 What’s the answer

Mathematics
2 answers:
Arisa [49]3 years ago
5 0
You first move the constant to the left so it’s
-5x-4y+8=0
then you change the signs
5x+4y-8=0
that’s the answer
Elden [556K]3 years ago
4 0

Answer:

y = -x + 2

Step-by-step explanation:

— 5х – 4у = -8

-4y = 4x - 8

4y = -4x + 8

y = -x + 2

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is hanging birdhouses on her ​fence, which includes one red post. The first birdhouse is 27.7 in. to the right of the red post.
Alexus [3.1K]

Answer:

3 inches to the right

Step-by-step explanation:

The first birdhouse is 27.7 inches to the right

The second birdhouse is 24.9 inches to the left  or -24.9  ( left is negative)

The distance between is  found by adding the distances

27.7 - (24.9)

27.7-24.9 =2.8

2.8

Rounding to the nearest integer

3 inches apart

Using integers

28 - (25)

3 inches

4 0
2 years ago
Read 2 more answers
An elevator is on the twentieth floor. It goes down 11 floors and then up five floors. What floor is the elevator on now?
love history [14]
The answer is -4

because when you minus 11 and 20 that will get you -9 and then you add 5 that get you the answer
8 0
2 years ago
What is the solution for -10 < x - 9?
meriva

Answer:

x > -1

Step-by-step explanation:

Simplify both sides of the equation, then isolate the variable.

4 0
2 years ago
Read 2 more answers
The graph shown represents the number of bacteria in a dish after a certain number of minutes. It is a function in the form f(x)
SSSSS [86.1K]

Answer:

The number of bacteria in the dish after 9.9 minutes is 478

Step-by-step explanation:

The form of the function is f(x)=a.b^{x} , where a is the initial amount (value f(x) at x = 0)

To find a and b let us use two points from the graph and substitute their coordinates in the equation

∵ The graph passes through point (1 , 1)

∴ x = 1 and y = 1

- Substitute them in the equation

∵ 1=a.b^{1}

∴ a.b = 1 ⇒ (1)

∵ The graph passes through point (1 , 1)

∴ x = 3 and y = 4

- Substitute them in the equation

∵ 4=a.b^{3}

∴ a.b³ = 4 ⇒ (2)

Use equation (1) to find a in terms of b

∵ a.b = 1

- Divide both sides by b

∴ a=\frac{1}{b} ⇒ (3)

- Substitute a in equation (2) by equation (3)

∴ \frac{1}{b} . b³ = 4

- Remember the rule \frac{a^{m}}{a^{n}}=a^{m-n}

∵ \frac{1}{b} . b³ = b^{3-1} = b²

∴ b² = 4

- Take √  for both sides

∴ b = 2

Substitute the value of b in equation (3) to find a

∵ a = \frac{1}{2}

∴ a = 0.5

∴ f(x)=0.5(2)^{x}

∵ f(x) represents the number of bacteria after x minutes

∵ x = 9.9 minutes

- Substitute x by 9.9 to find the number of bacteria

∵ f(9.9)=0.5(2)^{9.9}

∴ f(9.9) = 477.7128917

- Round it to the nearest whole number

∴ f(9.9) = 478

∴ The number of bacteria in the dish after 9.9 minutes is 478

4 0
3 years ago
A student estimates that it takes 2 hours to read 25 pages. At this rate, how many hours will she need to read 425 pages?
wolverine [178]

Answer:

34 hours

Step-by-step explanation:

2:25 = x:425

25/2 = 12.5

425/12.5 = 34

so it is 34:425

She will need to read for 34 hours to read 425 pages

7 0
3 years ago
Read 2 more answers
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