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3 years ago

Can you help me please

Mathematics

2 answers:

galina1969 [7]3 years ago

4 0

Answer:

y=2/5x

I dont know how to explain

LiRa [457]3 years ago

3 0

to get the slope of a line that passes through the origin, you can use this rule :
slope= y/x
so the slope is 5/2 which is the third option

hope this helps !

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Mark flips a coin and rolls a standard number cube. Find the probability that the coin will show tails and the cube will show a

Dmitriy789 [7]

Answer:

2 out of 6

Step-by-step explanation:

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3 years ago

Which of these tables represents a linear function?

lana66690 [7]

Answer:

table b

Step-by-step explanation:

Linear equations have a constant pattern in the y values and the second table consistently decreases by 1

7 0

3 years ago

Lucy is knitting a blanket and needs to buy some more yarn. At her local craft store, 2 skeins of yarn cost $7 and 8 Skeins of y

Gemiola [76]

Answer:

$y = 3.5x$

Where y is the cost and x is the number of skeins of yarn.

Step-by-step explanation:

To model this situation we can use the linear equation:

$y = ax + b$

Where y is the cost, x is the number of skeins of yarn, a is the slope of the equation and b is the y-intercept.

If 2 skeins of yarn cost $7, we have that:

$7 = 2a + b$

If 8 skeins of yarn cost $28, we have that:

$28 = 8a + b$

Multiplying the first equation by 4 and subtracting the second equation from it, we have:

$4*7 - 28 = 4*(2a + b) - 8a - b$

$28-28 = 8a + 4b - 8a - b$

$0 = 3b$

$b = 0$

Now, finding the value of a, we have:

$7 = 2a + b$

$7 = 2a + 0$

$a = 3.5$

So our equation is:

$y = 3.5x$

6 0

3 years ago

The LSRL after an exponential transformation is log ŷ = 0.4785 + 1.468x. What is the exponential form of the regression? ŷ = 29.

hoa [83]

Answer: $y = 3.00954 . 29.3765^x$

Step-by-step explanation:

Here, the transformed form of the exponential function,

$log y = 0.4785 + 1.468 x$

⇒ $y = 10^{0.4785+1.468x}$ ( because, $log y = a + b$ ⇒ $y = 10^{a+b}$ )

⇒ $y = 10^{0.4785}\times 10^{1.468x}$ ( Because, $a^{m+n}=a^m.a^n$ )

⇒ $y = 3.00954 . 29.3765^x$

Thus, Last Option is correct.

8 0

3 years ago

Lin’s Father is paying for $50 meal. He has a $15 percent off coupon for the meal. What is the price of a discounted meal before

WINSTONCH [101]

Note: Here tax rate is note given. Consider the tax is not applied.

Given:

Lin’s Father is paying for $50 meal.

Discount = 15%

To find:

The price of a discounted meal before the tax.

Solution:

Let x be the price of a discounted meal before the tax.

According to the question,

Price of meal after discount = Price of meal before discount - Discount

$50=x-\dfrac{15}{100}\times x$

$50=x-0.15x$

$50=0.85x$

Divide both sides by 0.85.

$\dfrac{50}{0.85}=x$

$58.823529=x$

$x\approx 58.824$

Therefore, the price of a discounted meal before the tax is $58.824.

6 0

3 years ago