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2 years ago

The equation y= -3x7 describes a parabola. Which way does the parabola open?

Mathematics

1 answer:

Vilka [71]2 years ago

4 0

Answer:

See below

Step-by-step explanation:

y = -3 x^7 is NOT a parabola.... y = -3x^2 IS a parabola that opens downward due to the negative coefficient (-3)

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Describe how to find 5-(-8) on a number line. If you found the difference using counters, would you get the same result? Explain

user100 [1]

First of all 5-(-8) is the same thing as 5+8. So you would add 5+8=13

5 0

3 years ago

All of the questions

Keith_Richards [23]

All these can be done without a calculator by taking the factors of ten separately. We count zeros for the exponents.

$770,000,000 / 1,100 = \dfrac{ 77 \times 10^7 }{11 \times 10^2} = 7 \times 10^5 = 700,000$

$3,900,000,000 / 13,000 = \dfrac{39 \times 10^8}{13 \times 10^3} = 3 \times 10^5 = 300,000$
I'll leave the rest for you or someone else, sorry.

6 0

3 years ago

1) Find the inverse function of f(x)=1/2x+3

dexar [7]

y = 1/2x + 3
change x and y

x = 1/2y + 3
now find the value of y and that is inverse function

x - 3 =1/2 y
y = 2x- 6

f-(x) = 2x - 6


for both domain : ( - ∞ , + ∞ )

range f (x) : ( - ∞ , + ∞ ) - { 0 }
range f-(x) :( -∞ , +∞)

8 0

4 years ago

Read 2 more answers

Please help me with these please.

Charra [1.4K]

6. Answer: y = 5x - 11

Step-by-step explanation:

Parallel means "same slope". y = 5x - 2 is in the form y = mx + b,

so the slope (m) = 5

Next, input the point (x₁, y₁ = 2, -1) and slope (m = 5) into the Point-Slope formula:

y - y₁ = m(x - x₁)

y - (-1) = 5(x - 2)

y + 1 = 5x - 10

y = 5x - 11

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

7. Answer: $\bold{y = \dfrac{1}{3}x + 4}$

Step-by-step explanation:

Perpendicular means "opposite reciprocal slope". y = -3x + 7 is in the form y = mx + b, so slope (m) = -3 ⇒ m⊥ = $\frac{1}{3}$

Next, input the point (x₁, y₁ = 3, 5) and slope (m = $\frac{1}{3}$ ) into the Point-Slope formula:

y - y₁ = m(x - x₁)

$y - 5=\dfrac{1}{3}(x - 3)$

$y - 5 =\dfrac{1}{3}x - 1$

$y=\dfrac{1}{3}x + 4$

8 0

3 years ago

Jack is paid £2400 a month.

olga2289 [7]

Answer:

300+400+500=1200

Step-by-step explanation:

given total paid $2400

spend $1200 on a rent (half of his paid)

so rest he spend as a ratio of 3:4:5=1200

let x as a amount he using to pays rest of the bills so

3x+4x+5x=1200

12x=1200

x=1200/12

x=100

so he spends 3x=300

4x=400

5x=500

hope it helps you

mark as brain list

7 0

3 years ago