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Yanka [14]
2 years ago
9

Somebody help me with this 30 points ☺️

Mathematics
1 answer:
brilliants [131]2 years ago
8 0

Answer:

4r- 21

Step-by-step explanation:

4 - r= r and r+ 21/= R21 and Simplified Is -4 and R21

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Use the substitution methods to solve the system of equations. Choose the correct ordered pair. y=7x+8 y=x+20
krek1111 [17]

Answer:

d

Step-by-step explanation:

Solution by substitution method

y=7x+8

∴y-7x=8

and y=x+20

∴y-x=20

Suppose,

-7x+y=8→(1)

and -x+y=20→(2)

Taking equation (1), we have

-7x+y=8

⇒y=7x+8→(3)

Putting y=7x+8 in equation (2), we get

-x + 7x + 8 = 20

6x = 20-8

6x = 12

x= 12 / 6

x = 2

substitute for x in equation (3)

y = 7(x) + 8

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2 years ago
Help Asap Fast will mark as brainliest
inna [77]
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8 0
2 years ago
7 divided by somethings equal 7.35
Dmitriy789 [7]
Let's translate it into an equation and then solve...

7/x = 7.35
x * 7/x = 7.35 * x
7 = 7.35x
7/7.35 = x
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So 7 divided by .9524 (rounded to the nearest ten thousandth) equals 7.35
6 0
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How many grams are equal to 3,418 milligrams? Use the placement of the decimal point when dividing by a power of 10 to help you.
k0ka [10]

Answer:

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Step-by-step explanation:

A gram is 1/1000 of a gram so if we move the decimal point over 3 places you get 3.418.

6 0
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Does ssa guarantee congruence between two triangles ?
Levart [38]
No the congruence statements are sas,asa,sss, aas and hl
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