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emmasim [6.3K]
3 years ago
9

the sum of the digits of a two digit number is 7 if the digits are reversed the new number was increased by 3 equals 4 times the

original number find the number​
Mathematics
1 answer:
gtnhenbr [62]3 years ago
5 0

Answer:

16

Step-by-step explanation:

61+3=64

16*4=64

64=64

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3. Which statements about the line that passes through (-2, 0) and (2, -4) are true?
diamong [38]

Answer:

B, C, and D.

Step-by-step explanation:

Let's go through each answer choice.

A: To find the slope of a line from two points, we use this formula: (y_2-y_1)/(x_2-x_1). Plugging in the values (-2,0) and (2, -4), we get:

  • (-4-0)/(2+2)
  • -4/4
  • -1

Because option A says the slope is 1, but we got -1, option A is false.

B: To find the y-intercept, we use this formula: b = y_1 - m * x_1

  • b = 0 -(-1) * (-2)
  • b = 1 * (-2)
  • b = -2  

Since we know the value of b is the y-intercept, we could write the y-intercept as (0,-2). Therefore, option B is true.

C: The equation of a line (in slope-intercept form) is y = mx + b, where y - y-coordinate, m = slope, x = x-coordinate, and b = y-intercept. Since we already solved for the y-intercept and slope, let's plug in those values:

  • y = mx +b
  • y = -x -2

As you can see, the equation we got here matches the one in option C, meaning it's true.

D: We know that a point is written like this: (x, y). If the x-coordinate is not zero but the y-coordinate is, then it's the x-intercept. Since the question says that (-2,0) is one of the points the line passes through, and option D says that the x-intercept is (-2,0), it's true.

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3 years ago
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4 years ago
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Pythagorean theorem to find the length of the hypotenuse in the triangle 16 30
pishuonlain [190]

Answer:

the answer is 34.

Step-by-step explanation:

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3 years ago
Math need help asap ty po sa makaka sagot
Hatshy [7]
<h2>Answer:</h2>

please see analysis

<h2>Step-by-step explanation:</h2>

\left\{\right.{ \triangle}\ RST\cong { \triangle}\ DEF

(SSS\ Congruence\ Postulate)

2.\ { \triangle\ CAT\cong { \triangle\ BED\ \left\{\right.Given\left.\ \right\}

\bar{AT}\cong\bar{ED}

\overline{AT}=20

so\ \overline{ED}=20

DE=3x-7=20\rightarrow\ x=9

<em>I hope this helps you:)</em>

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2 years ago
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