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maria [59]
3 years ago
12

Find the distance between the two points. (−4, 7), (4, 0)

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0

Distance²  =  (difference in 'y')² + (difference in 'x')²

                =                 (0 - 7)²  +  (4 + 4)²

               =                    49       +      64

               =                     113

Distance =        √113  =  approx. 10.63   (rounded) 
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5 0
2 years ago
Please help, Thanks.
Evgen [1.6K]

Answer:

C

Step-by-step explanation:

49x² + 28xy + 4y² ← is a perfect square of the form

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49 = 7² ⇒ a = 7 and 4 = 2² ⇒ b = 2

2ab = 2 × 7 × 2 = 28

Hence

49x² + 28xy + 4y² = (7x + 2y)²

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3 years ago
Find the x will name brainlist
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\huge \boxed{\mathbb{QUESTION} \downarrow}

  • Find x.

\large \boxed{\mathbb{ANSWER\: WITH\: EXPLANATION} \downarrow}

To solve these type of problems you need to use the pythagoras theorem ⇨ Hypotenuse² = Base² + Altitude².

Here,

  • Altitude = 1.6 cm.
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Now, let's solve for x.

Hypotenuse² = Base² + Altitude²

x² = (1.2)² + (1.6)²

x² = 1.44 + 2.56

x² = 4

x = √4

x = <em><u>2</u></em><em><u>.</u></em>

  • So, the value of x is <em><u>2</u><u> </u><u>cm.</u></em>

<h3><u>NOTE</u><u> </u><u>:</u><u>-</u></h3>
  • Pythagoras theorem can be used only in the cases of right-angled triangles. Here, it's given that the triangle is right angled so we can use this theorem.
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3 years ago
Using (x + a) (x + b) = x² + (a + b) x + ab, evaluate 75 x 77
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(x + a) (x + b) = x² + (a + b) x + ab

75 * 77=

=(70+5)(70+7)

=70²+(5+7)*70+5*7

=4900+12*70+35

=4900+840+35

=5775

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Answer:

Step-by-step explanation:

c(t)=40:0≤t≤400

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6 0
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