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2 years ago

Need help on this one

Mathematics

2 answers:

11Alexandr11 [23.1K]2 years ago

5 0

Answer:

slope is -1/7 and y intercept is 2

Step-by-step explanation:

Misha Larkins [42]2 years ago

5 0

Slope is -1/7 and y-int is 2
slope will always be the number in front of x for the y=mx+b formula

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Please help, I'll mark brainliest.

GREYUIT [131]

I'm almost certain it's C :)

8 0

2 years ago

A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Portland. The stu

iVinArrow [24]

Answer:

$-0.061 < P_1 -P_2< 0.025$

Step-by-step explanation:

Give data:

$n_1 = 350$

$n_2 =250$

$x_1 = 23$

$x_2 = 21$

$\hat{P} 1 = \frac{x_1}{n_1} = \frac{23}{350} = 0.066$

$\hat{P} 2 = \frac{x_2}{n_2} = \frac{21}{250} = 0.084$

for 95% confidence interval

$\alpha = 1 - 0.95 = 0.05 and \alpha/2 = 0.025$

$z_{\alpha/2} = 1.96$ from standard z- table

confidence interval for P_1 and P_2 is

$\hat{P} 1 - \hat{P} 2 \pm z_{\alpja/2} \sqrt{\frac{\hat{P} 1(1-\hat{P} 1)}{n_1} +\frac{\hat{P} 2(1-\hat{P} 2)}{n_2}}$

$(0.066 - 0.084) \pm 1.96 \sqrt{\frac{0.066(1-0.066)}{350} +\frac{0.084(1-0.084)}{250}}$

$-0.018 \pm 0.043$

confidence interval is

$-0.018 - 0.043 < P_1 -P_2$

$-0.061 < P_1 -P_2< 0.025$

7 0

2 years ago

Work out the area of the triangle.

sveta [45]

Answer:

120

Step-by-step explanation:

10*24=240

240/2=120

7 0

2 years ago

Answer for brainlest and 10 points

valkas [14]

Answer:

Rational

Step-by-step explanation:

This can be reduced to a ratio of 1/2. Numbers that can be expressed as ratios are rational.

7 0

2 years ago

Is 5 a reasonable answer for |2x+7|=x+3?

Llana [10]

Answer:

Step-by-step explanation:

Two possible answers for x could be -4 or -10/3. Neither of those are close to 5. Therefore, the answer is no.

7 0

2 years ago

Need help on this one​

Need help on this one