What is the value of 4 x minus 7 when x = 4?

Mathematics

2 answers:

Stella [2.4K]3 years ago

7 0

Answer:

Step-by-step explanation:

4x - 7 ( x=4)

4 × 4 - 7

16 - 7

Stolb23 [73]3 years ago

6 0

Answer: 9

Step-by-step explanation: Here, we have the expression 4x - 7 and we want to evaluate the expression when x is equal to 4.

To evaluate an expression, we simply plug the value

of the variable into the expression and solve.

So here, since x is equal to 4, we have 4(4) - 7.

4(4) is equal to 16.

So we have 16 - 7 which is equal to 9.

So the value of our expression when x is equal to 4 is 9.

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Normal

ira [324]

Answer:

option A: 0.2357

Step-by-step explanation:

P( less than 1.76 or greater than 2.39) = P(X < 1.76) + P( X > 2.39)

P(X < 1.76) = 0.0126 (as per the excel output)

P(X < 2.39) = 0.7769

Hence P( X> 2.39) = 1- 0.7769 = 0.223

P( less than 1.76 or greater than 2.39) = P(X < 1.76) + P( X > 2.39) = 0.0126 + 0.223 = 0.2357

P( less than 1.76 or greater than 2.39) = 0.2357

8 0

3 years ago

Read 2 more answers

Find dy/dx if f(x) = (x + 2)^7x.

lana [24]

$\dfrac{\mathrm d}{\mathrm dx}(x+2)^{7x}=\dfrac{\mathrm d}{\mathrm dx}e^{7x\ln(x+2)}$

By the chain rule, the derivative reduces to

$e^{7x\ln(x+2)}\dfrac{\mathrm d}{\mathrm dx}(7x\ln(x+2))=(x+2)^{7x}\dfrac{\mathrm d}{\mathrm dx}(7x\ln(x+2))$

Then using the product rule, we get

$(x+2)^{7x}\left(7\ln(x+2)+\dfrac{7x}{x+2}\right)$

4 0

3 years ago

morris bought 2 in a half feet of felt the price of felt was $3.90 per yard. how much did morris pay for his felt

STatiana [176]

Answer:

$9.75

Step-by-step explanation:

$3.90 per yard

So $3.90 for 1 yard = $3.90

$3.90 for 2nd yard =$3.90

1/2 of $3.90 for 1/2 yard so $3.90/2 = $1.95

$3.90