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3 years ago

Please help! Brainliest if correct!

Mathematics

1 answer:

ELEN [110]3 years ago

5 0

Answer:

x:(x +15)

Step-by-step explanation:

The corresponding sides that are in proportion are apparently ...

PS:PQ = PT:PR

PT = x

PR = x+15

so the proportion of interest is ...

28:40 = x:(x+15)

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-2 = k+7/3 solve for x and show work this is all the info i have dont get this deleted

Finger [1]

Answer:

$- 2 = k + \frac{7}{3} \\ - 2 \times 3 = k + \frac{7}{3} \times 3 \\ - 6 = k + 7 \\ - 6 - 7 = k + 7 - 7 \\ - 13 = k \\ or \\ k = - 13$

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3 years ago

Can someone pls help

adelina 88 [10]

The answer is b. I know because I know my math. Hoped this helped.

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3 years ago

When two balanced dice are rolled, there are 36 possible outcomes. Find the probability that the sum is a multiple of 3 or great

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As the carbon content in steel increases, its ductility tends to decrease. A researcher at a steel company measures carbon conte

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Answer:

d. -5.666 to -0.926

Step-by-step explanation:

Here a pivotal quantity is $T = \frac{\hat{\beta_{1}}-\beta_{1}}{se(\hat{\beta_{1}})}$ where $\beta_{1}$ is the true slope of the regression equation (unknown), $\hat{\beta_{1}}$ is its least square estimate and $se(\hat{\beta_{1}})=1.097$ is its estimated standard error. And T has t-distribution with n-2=15-2=13 degrees of freedom (n is the sample size). We have that $\hat{\beta_{1}} = -3.30$ , and because we want the 95% confidence interval, we should use the 2.5th quantile of the t distribution with 13 df, this value is -2.16 and the 95% confidence intervale is given by $\hat{\beta_{1}}\pm t_{0.025}se(\hat{\beta_{1}})$ , i.e., $-3.30\pm (2.16)(1.097)$ . Therefore, the 95% confidence interval explicitly is (-5.666, -0.926)

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4 years ago

A line passes through the point (-2, -6) and has a slope of

lapo4ka [179]

ANSWER: y = 2x + -6

EXPLANATION

Slop intercept for is

Y = Mx + b

Where Mx is the slope and b is they y intercept

The slope is 2 and the y intercept is -6

We know the y intercept cause it’s written (x,y) and -6 is in the y value spot.

So just plug in the numbers and you get

Y= 2x + -6

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2 years ago

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