which of the following systems of linear equations has no solution?

Answer:

3

Step-by-step explanation:

if you can't use calculator, you must know that after a number being square root, it MUST be in positive

for the negative answer will be false

so for the rest of the answer you need to try it

3² = 9 < 10 so it's true

4² =16 > 10 so it's false

the only answer is 3

Answer:

y = -x +2

Step-by-step explanation:

First let's find the slope.

(-1,3) and (4,-2)

3 - -2/ -1 - 4 = 5/-5 = -1

Slope = -1

Now let's use slope intercept form:

y1-y2=m(x1-x2)

Let's plug in our slope for m.

y1-y2= -1 (x1-x2)

And now let's substitute y2 and x2 for one of our points, I'll use (4,-2)

y1+2 = -1(x1- 4)

y= -x + 4 -2

y = -x +2

Answer:

852 students walking to school

Step-by-step explanation:

Lets start with a simple example so you can get it

if 60% of 100 students walk to school that means

60 students walk to school... right??

so lets simplify it more that means you have multiplied 100 (students) by 60%

or [tex]\frac{60}{100}[/tex]  (note: you can say that 60% is equal to [tex]\frac{60}{100}[/tex] )

so the problem told 60% of 1420 students walk to school that means we should

do this:     [tex]1420*\frac{60}{100} = 852[/tex]

Answer:

852 walk to school

Step-by-step explanation:

i got this because i divided the 1420 into 10 which became a 142, multiply by 6 and you get 852

also you could

it is really simple also, all you have to do is multiply the number of student, S times the precent of students who walk, so s times w, which is 60 precent turend into .6 precent so 1420 x .6

Answer:

-21

Step-by-step explanation:

GIven data

We are given the equation of a line as

Y=-2x-21

let us compare this with the general equation of a line

y=mx+c

from the comparison, we can see that the intercept is -21

Therefore, the intercept is -21

Answer:

(a) 19%

(b) 5:6

Step-by-step explanation:

Given: Gh 258,000

salaries Gh 49,020

training Gh 72,000

housing Gh 60,000

entertainment Gh 12,000

exigencies Gh 23,020

(a) Percentage of the income spent on salaries = [tex]\frac{amount of salaries}{total income}[/tex] x 100

                           = [tex]\frac{49020}{258000}[/tex] x 100

                           = 0.19 x 100%

                           = 19%

The percentage of the income spent on salaries is 19%.

(b) Ratio of amount for housing to amount for training = [tex]\frac{amount for housing}{amount for training}[/tex]

                                = [tex]\frac{60000}{72000}[/tex]

                                = [tex]\frac{5}{6}[/tex]

The ratio of the amount for housing to the amount for training is 5:6

Answer:

i

Step-by-step explanation:

Answer:

12 feet

Step-by-step explanation:

use the pythagorean theorem to figure out what the hypotenuse is

3.5^2+3.5^2=x^2

12.25+12.25=x^2

25=x^2

x=5

now that you know the hypotenuse, you can find the perimeter by adding up all the sides

3.5+3.5+5=12

Answer:

B, C, D

Step-by-step explanation:

Those are the equivalent ratios, look where the umbers are placed in the question to where they are placed in the ratio

Answer:

125

Step-by-step explanation:

Answer:

a)2.90m

c) 4700m

Step-by-step explanation:

I know answers for these only

please give brainliest

Answer:

x=8

Step-by-step explanation:

Answer:

-1/3

Step-by-step explanation:

Slope Formula = (y2-y1) over (x2-x1)

(1-2) over (0- -3)

(-1) over (0+3)

-1 over 3

-1/3

Hope this helps. Have a nice day you amazing bean child.

Answer:

a)

The point estimate is 0.368.

The 95 percent confidence interval for the proportion of all U.K. television ads that use humor is (0.321, 0.415).

b)

The point estimate is 0.262.

The 95 percent confidence interval for the proportion of all U.S. television ads that use humor is (0.222, 0.302).

c)

Yes, because the lower bound of the confidence interval for UK proportions is higher than the upper bound of the confidence interval for US proportions.

Step-by-step explanation:

(a) Suppose that a random sample of 400 television ads in the United Kingdom reveals that 147 of these ads use humor.

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

Sample of 400:

This means that [tex]n = 400[/tex]

Point estimate:

[tex]\pi = \frac{147}{400} = 0.368[/tex]

The point estimate is 0.368.

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

The lower limit of this interval is:

[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.368 - 1.96\sqrt{\frac{0.368*0.632}{400}} = 0.321[/tex]

The upper limit of this interval is:

[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.368 + 1.96\sqrt{\frac{0.368*0.632}{400}} = 0.415[/tex]

The 95 percent confidence interval for the proportion of all U.K. television ads that use humor is (0.321, 0.415).

(b) Suppose a random sample of 455 television ads in the United States reveals that 119 of these ads use humor.

Sample of 455:

This means that [tex]n = 455[/tex]

Point estimate:

[tex]\pi = \frac{119}{455} = 0.262[/tex]

The point estimate is 0.262.

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

The lower limit of this interval is:

[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.262 + 1.96\sqrt{\frac{0.262*0.738}{455}} = 0.222[/tex]

The upper limit of this interval is:

[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.262 + 1.96\sqrt{\frac{0.262*0.738}{455}} = 0.302[/tex]

The 95 percent confidence interval for the proportion of all U.S. television ads that use humor is (0.222, 0.302).

(c) Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor?

Yes, because the lower bound of the confidence interval for UK proportions is higher than the upper bound of the confidence interval for US proportions.

Answer:

$69.75

Step-by-step explanation:

$9 x 7 = $63

45 min/60 min = 0.75

$9 x 0.75 = $6.75

$63 + $6.75 = $69.75

Answer:

$69.75

Step-by-step explanation:

$9 x 7 hours = $63

$9 x 3/4 = $6.75

$63 + $6.75 = $69.75

I hope this helps :)

Answer:

(-2,-5)

Step-by-step explanation:

Answer:

-2, -5

Step-by-step explanation:

Answer:

A) x = -3

Step-by-step explanation:

|3(-3) + 9| = 0

|-9 + 9| = 0

|0| = 0

0 = 0

Answer:

A)x=−3

Step-by-step explanation:

Step 1: Add -6 to both sides.

|3x+9|+6+−6=6+−6

|3x+9|=0

Step 2: Solve Absolute Value.

|3x+9|=0

We know 3x+9=0

3x+9=0(Possibility 1)

3x+9−9=0−9(Subtract 9 from both sides)

3x=−9

3x /3 = −9 /3

(Divide both sides by 3)

x=−3

Answer:

this is true p=7

And this is false p=8

p=6

p=5

Answer:

He paid $108.33 down and will owe $216.67

Step-by-step explanation:

:)

Answer: -x^2-2x-1

Step-by-step explanation:

Answer:

go everything youve learnt from grade 3 come right up

Step-by-step explanation:

sometimes its knowing the simply formulas thatll get you through

Answer:

48

Step-by-step explanation: surface area = 2 (lw + hl + hw)

2 ( 2 x2 + 5x2 + 5x2)

2 (4+10+10)

2(24)

48 cm

Step-by-step explanation:

Answer:

          WHAT THE OTHER PERSON SAID

Step-by-step explanation:

9514 1404 393

Answer:

  £592 for 16 boxes

Step-by-step explanation:

The classroom floor area is ...

  A = LW = (8.8 m)(2.2 m) = 19.36 m²

The cupboard floor area is ...

  A = (2.3 m)(2.1 m) = 4.83 m²

Then the total area to be covered is ...

  19.36 m² +4.83 m² = 24.19 m²

At 1.6 m² per box, the number of boxes required is ...

  (24.19 m²)/(1.6 m²/box) = 15.12 boxes

If we assume we can only purchase whole boxes, we need to purchase 16 boxes to cover the floor. The cost will be ...

  (16 boxes)(£37/box) = £592 . . . . cost of laminate to replace the floor

Answer:

1800$

Step-by-step explanation:

(6% of 500 is 30)

(30 x 12 is 360)

(360 x 5 is 1800)

Answer:

~77°

Step-by-step explanation:

cosQ = 9/40

inverse cosine(9/40) ≈ 77° = Q