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vivado [14]
3 years ago
13

PLEASE HELP For what value of the variable will the value of 2x+1 be 20 greater than 8x+5?

Mathematics
1 answer:
wlad13 [49]3 years ago
6 0

It will be a negative.

for an example: -20 for x would mqke 2x + 1 into -39 and 8x + 5 into -155. that's 116 apart, so maybe -2(8) + 5 = -11

-2(2) + 1 = -3

but that's only 8 apart, so it'd be higher.

-4(2) + 1 = -7

-4(8) + 5 = -27

BOOM

Tadaaaa,

You probably thought positive, but sometimes it's negative, you know what I mean?

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3. line has undefined slope and passes through (1,8)
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Answer: x = 1

Step-by-step explanation:

(any line with an undefined slope is a vertical line)

x = 1 has an undefined slope and passes through (1,8)

7 0
3 years ago
Geometry math question
Brut [27]

Look at the picture.

Let |AE| = |AD| = b

We have a proportion:

\dfrac{x}{13}{y}=\dfrac{19}{y+a}=\dfrac{x}{y+2a}

Solve for y from first proportion

\dfrac{13}{y}=\dfrac{19}{y+a}\ \ \ |\text{cross multiply}\\\\19y=13(y+a)\\\\19y=13y+13a\ \ \ \ |-13y\\\\6y=13a\ \ \ |:6\\\\y=\dfrac{13}{6}a

Substitute to the second proportion

\dfrac{19}{y+a}=\dfrac{x}{y+2a}\\\downarrow\\\dfrac{19}{\frac{13}{6}a+a}=\dfrac{x}{\frac{13}{6}a+2a}\\\\\dfrac{19}{\frac{13}{6}a+\frac{6}{6}a}=\dfrac{x}{\frac{13}{6}a+\frac{12}{6}a}\\\\\dfrac{19}{\frac{19}{6}a}=\dfrac{x}{\frac{25}{6}a}\ \ \ \ |\dot a\neq0\\\\\dfrac{19}{\frac{19}{6}}=\dfrac{x}{\frac{25}{6}}\\\\19\cdot\dfrac{6}{19}=x\cdot\dfrac{6}{25}\\\\6=\dfrac{6x}{25}\ \ \ |\cdot25\\\\6x=6\cdot25\ \ \ |:6\\\\x=25

Answer: B. 25

7 0
3 years ago
V=u+at<br> u= 2<br> a= -5<br> t=1/2 <br> what is the value of v
artcher [175]
At= -5(1/2)
at= -2.5
v= u + at
v= 2 + (-2.5)
v= -0.5
3 0
2 years ago
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Answer:

Step-by-step explanation:

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p(x)=c=-8/64

p(x)=c=-1/8

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3 years ago
Which equation shows the point-slope form of the line that passes through (3, 2) and has a slope of 1/3
Mnenie [13.5K]

Answer:

y-y1=m(x-x1)

y-2=1/3(x-3)

y=1/3x+1

3 0
3 years ago
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