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3 years ago

Solve the system of subsitution method y=2-1 and y=x+3

Mathematics

1 answer:

aleksklad [387]3 years ago

4 0

The answer should be x=-2

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Find the value of r 4(x-3) -r +2x =5(3x-7) -9x <br> Please help me

lbvjy [14]

$4(x-3)-r+2x=5(3x-7)-9x\ \ \ |\text{use distributive property}\\\\(4)(x)+(4)(-3)-r+2x=(5)(3x)+(5)(-7)-9x\\\\4x-12-r+2x=15x-35-9x\\\\(4x+2x)-12-r=(15x-9x)-35\\\\6x-12-r=6x-35\ \ \ \ |-6x\\\\-12-r=-35\ \ \ \ |+12\\\\-r=-23\to\boxed{r=23}$

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3 years ago

Which equation represents seven times a number decreased by 2 is 19? A) 7 + x - 2 = 19 B) 7x + 2 = 19 C) 2x - 7 = 19 D)

Helen [10]

Answer:

7n - 2 = 19

Step-by-step explanation:

7 times a number is 7n.

7 times a number, decreased by 2, is 7n - 2.

7 times a number, decreased by 2, is 19 is represented by 7n - 2 = 19

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3 years ago

Y=x-3 determine the slope

Anettt [7]

It is the answer M: 1

7 0

3 years ago

Draw a fraction that is equivalent to 1/6

iVinArrow [24]

Some equivalent fractions of 1/6 are:
1/6 = 2/12 = 3/18 = 4/24 = 5/30 = 6/36 = 7/42 = 8/48 = 9/54 = 10/60 = 11/66 = 12/72 = 13/78 = 14/84 = 15/90 = 16/96 = 17/102 = 18/108 = 19/114 = 20/120 = 21/126 = 22/132 = 23/138 = 24/144 = 25/150 = 26/156 = 27/162 = 28/168 = 29/174 = 30/180 = 31/186 = 32/192 = 33/198 = 34/204 = 35/210 = 36/216 = 37/222 = 38/228 = 39/234 = 40/240

7 0

3 years ago

HELP MEEEEE PLEASEEEEEE

Sindrei [870]

Answer:

$x=16\dfrac{28}{37}\\ \\y=5\dfrac{1}{3}\\ \\z=7.5$

Step-by-step explanation:

The diagram shows three paralel lines which divide the large triangle into three similar triangles.

By Thales theorem,

$\dfrac{5}{z}=\dfrac{y}{8}=\dfrac{2}{3}$

Then

$\dfrac{5}{z}=\dfrac{2}{3}\Rightarrow 2z=15,\ z=7.5\\ \\\dfrac{y}{8}=\dfrac{2}{3}\Rightarrow 3y=16,\ y=\dfrac{16}{3}=5\dfrac{1}{3}$

From the similarity of triangles,

$\dfrac{x}{20}=\dfrac{z+8}{z+8+3}\\ \\\dfrac{x}{20}=\dfrac{7.5+8}{7.5+8+3}\\ \\\dfrac{x}{20}=\dfrac{15.5}{18.5}\\ \\x=20\cdot \dfrac{155}{185}=20\cdot \dfrac{31}{37}=\dfrac{620}{37}=16\dfrac{28}{37}$

6 0

3 years ago