All categories

3 years ago

Evaluate. X/4-y^2 + 3 1/4 x= if 12 and y=3

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

7 0

Answer:

− 17/4 or −4.25

hope it helps

You might be interested in

A certain forest covers an area of 4300 km2 . suppose that each year this area decreases by 3.25% . what will the area be after

Gemiola [76]

A =P(1-3.25%)⁸

A= 3,301.23 km²

7 0

3 years ago

How many copies of 1 twelfth are equivalent to 3 sixths? Help!

andrezito [222]

Answer:

6/12 is equal to 3/6 ( 6 twelfths is equal to 3 sixths )

Step-by-step explanation:

multiply both sides of 3/6 by 2 to get the same denominator, doing that will get you 6/12

3 0

3 years ago

Read 2 more answers

Reed bought 1.8 pounds of green beans. The green beans cost $1.27 per pound. What was the total cost of Reed’s green beans? Roun

STALIN [3.7K]

Answer:

2.3

Step-by-step explanation:

5 0

3 years ago

I need help to find the measures and equation pls.

siniylev [52]

Answer:

Equation: 7x + 8x = 180

x = 12

∠CBA = 84

∠CFH = 96

Step-by-step explanation:

We can see that ∠CBA = ∠CFE and ∠CBD = ∠CFH.

We know that the sums of two angles on a straight line are going to be equal to 180.

∠CBA = 7x

∠CFH = 8x

To find the value of x, we must do the following:

7x + 8x = 180

15x = 180

15x/15 = 180/15

x = 12

Now we just substitute to find the angle measures:

∠CBA = 7 · 12 = 84

∠ CFH = 8 · 12 = 96

7 0

2 years ago

In a manufacturing process a random sample of 9 bolts manufactured has a mean length of 3 inches with a standard deviation of .3

Serggg [28]

Answer:

The correct option is (C) (2.769, 3.231).

Step-by-step explanation:

The confidence interval for mean when the standard deviation is not known is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}$

Given:

$\bar x = 3\\s=0.3\\n=9\\\alpha =1-0.95=0.05$

Compute the critical value as follows:

$t_{\alpha/2, (n-1)}=t_{0.05/2, (9-1)}=t_{0.025, 8}=2.31$

**Use a <em>t</em>-table.

The 95% confidence interval for true mean length of the bolt is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}\\=3\pm 2.31\times \frac{0.30}{\sqrt{9}}\\ =3\pm 0.231\\=(2.769, 3.231)$

Thus, the 95% confidence interval for true mean length of the bolt is (2.769, 3.231).

The correct option is (C).

7 0

3 years ago