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Nina [5.8K]
2 years ago
15

PLEASE HELP I NEED HELP ASAP

Mathematics
1 answer:
Slav-nsk [51]2 years ago
5 0

Answer:

y=-x+15

Step-by-step explanation:

Slope-intercept form is written as y=mx+b where m is the slope and b is the y-intercept.

Any line perpendicular to a given line with slope m has a slope of -\frac{1}{m}. Therefore, the slope of a line perpendicular to y=x+12 is -\frac{1}{1}=-1.

We can now plug the coordinate it passes through into our slope-intercept form equation to solve for the y-intercept:

3=-1(12)+b,\\b=15

Therefore, the equation of the line that is perpendicular to y=x+12 and passes through the coordinates (12,3) is \fbox{$y=-x+15$}.

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Jake's test scores are 86, 70, 72, 100, 96, and 80. What must Jake earn of his last test to earn a mean grade of exactly 85%?
kompoz [17]

Answer:

91

Step-by-step explanation:

Mean is calculated as

mean = \frac{sum}{count}

let x be his test score of his last test , then

\frac{86+70+72+100+96+80+x}{7} = 85 ( multiply both sides by 7 )

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4 0
2 years ago
What is the value of k?<br><br> -3 ( k + 7 ) - 5k + 4 = 23
Digiron [165]

Answer: k = -5

explanation-

distribute: -3k + -21 - 5k + 4= 23

combine: -8k -17 = 23

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6 0
3 years ago
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natita [175]

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big

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2

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3 years ago
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What are factors of 30
Dennis_Churaev [7]
1,2,3,5,6,10,15,30 because by looking at the number at the ones place, when it is 0 or an odd number, it could be divided by 2. When the places are added together and when it is divisible by 3, it is the factor of 3. Also, when there are 2 and 3 as a factor, it is also divisible by 6.
8 0
3 years ago
PLEASE HELP HURRY!!!!!!!!!
Rzqust [24]

Answer:

PC = 14.42 cm

Step-by-step explanation:

If a tangent and secant are drawn from a point outside a circle, then the product of the lengths of the segments of the secant is equal to the square of the length of the tangent.

PC² = PB × BD

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PC = \sqrt{208}

PC = 14.42 cm

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