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3 years ago

I need help with these

Mathematics

1 answer:

tia_tia [17]3 years ago

7 0

Answer:

Step-by-step explanation:

5) -7 (-15w + 21) + 3(18 - 27w)

Step 2: 105w - 81w - 147 + 54

step 3: 24w - 93

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Java 1

KatRina [158]

Answer:

Q20 b.16

Q21 a.6

Step-by-step explanation:

count charcters Have a nice day! ==16

Q21 why 6

because index start with 0 and not 1

just count

H ==> 0

e==> 1

l==> 2

W=>6

6 0

3 years ago

Can someone help me with this question pls

jarptica [38.1K]

Answer:

20 student who have a screen time of 12 or more hours have a grade below 80

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3 years ago

2<br> 9 20,36, and 48 203948<br> GCF

shusha [124]

Answer: GCF is 4 because they’re all divisible by three and nothing higher than that.

Step-by-step explanation:

8 0

3 years ago

Point D is the in center of triangle ABC. Write an expression for the length x in terms of the three side lengths AB, AC, BC.

shutvik [7]

Answer :

$\underline{ \boxed{x = \frac{2(A_T) }{(AB) + (AC) + (BC)} }}$

Explanation :

$i \: figured \: it \: out \to \: notice \: that \\ there \: are \:( thre e\: trianges) \: in \: triangle \: ( ABC) \\ and \: they \: all \: have \: the \: same \: height \: = x \\ first \: triangle \: is \: \to \: triangle \: (ABD) \\ second\: triangle \: is \: \to \: triangle \: (ACD) \\ third \: triangle \: is \: \to \: triangle \: (BCD) \\ if \: the \: area \: of \: a \: triangle \: is \: = \frac{1}{2} bh : then \to \\ the \: area \: of \: triangle \: (ABD) = \frac{1}{2} (AB)x \\ the \: area \: of \: triangle \: (ACD) = \frac{1}{2} (AC)x \\ the \: area \: of \: triangle \: (BCD) = \frac{1}{2} (BC)x \\ let \: the \: total \: area \:(A_T) \: be \to \: \frac{1}{2} (AB)x + \frac{1}{2} (AC)x + \frac{1}{2} (BC)x \\ if \to\\ (A_T) = \frac{1}{2} (AB)x + \frac{1}{2} (AC)x + \frac{1}{2} (BC)x \\ then \to \\ (A_T) = \frac{1}{2} \{(AB)x + (AC)x + (BC)x \} \\ x \{(AB) + (AC) + (BC) \} = 2(A_T) \\ x = \frac{2(A_T) }{(AB) + (AC) + (BC)}$

3 0

3 years ago

Use the slope formula to find the slope of the line through the points (−1,−1) and (−2,−2).

lozanna [386]

Answer: The slope is 1

Step-by-step explanation:

The slope formula is (y2 - y1)/(x2-x1)

Plugging in these values, we get (-2 - (-1))/(-2 - (-1)), or -1/-1, or simply 1.

Hope it helps :)

6 0

3 years ago