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aksik [14]
3 years ago
12

6. Solve the system using substitution.

Mathematics
2 answers:
vampirchik [111]3 years ago
7 0
4x=(-3x)+18
7x=18
x≈2.5

4(2.5)=3y-2
10=3y-2
12=3y
y=4

your answer is B.(2.5,4)



irina [24]3 years ago
4 0

Answer:

The answer is the option A

(4,6)

Step-by-step explanation:

we have

4x=3y-2 -----> equation A

18=3x+y ----> isolate the variable y

y=-3x+18 -----> equation B

Substitute the equation B in the equation A

4x=3(-3x+18)-2

4x=-9x+54-2

4x+9x=52

13x=52

x=4

substitute the value of x in the equation B

y=-3(4)+18=6

therefore

the solution is the point (4,6)

You might be interested in
Is the sequence 4, 8, 12, 16, 20, ... a geometric sequence? If it is a geometric sequence, what is the common ratio?
vovangra [49]

Answer and Step-by-step explanation:

This sequence is NOT a geometric sequence.

It is an arithmetic sequence, because the numbers are going up using addition, going up each time by 4.

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

3 0
3 years ago
Please help me solve step by step it's urgent​
NNADVOKAT [17]

Answer:

2i: 169.71

2ii: 0.17L

3a: 4×10⁻⁵

3b: 110011

Step-by-step explanation:

2i. The surface of the top and bottom of the tin is two times (top and bottom) π·r² = 2·π·3² = 18π cm².

The circumference of the circle is 2·π·r = 6π cm².

The area of the material connecting top and bottom is a rectangle of the tin height times the circumference: 6·6π = 36π cm².

This gives a total of  18π + 36π = 54π  cm².

With π approximated by 22/7 the total surface area is 54*22/7 ≈ 169.71.

Notice how the calculation is simple by waiting until the very last moment to substitute π.

2ii. The volume is the area π·r² of the circle times the height of the tin: 9π*6 = 54π cm³ ≈ 169.71 cm³.

Since 1L = 1000 cm³ the volume is 0.16971 litres, which should be rounded to 0.17 L.

3a: If we rewrite P as 36 x 10⁻⁴ and realize that 36/2.25 = 16, then the fraction can be written as

16 x 10⁻⁴⁻⁶ = 16 x 10⁻¹⁰.

The square root of that is taking it to the power of 1/2, so (16x10⁻¹⁰)^0.5 = 4x10⁻⁵ = 0.00004

3b: 1111 1111 is 255 in decimal. 101 is 5 in decimal. 255/5 is 51 in decimal. 51 in binary is 110011.

6 0
4 years ago
PLSSSSSSSSSSSSSSS HELP pls
sertanlavr [38]

{\qquad\qquad\huge\underline{{\sf Answer}}}

Let's solve ~

\qquad \sf  \dashrightarrow \: 10x + 30 = 90

[ according to given figure ]

\qquad \sf  \dashrightarrow \: 10x = 90 - 30

\qquad \sf  \dashrightarrow \: 10x = 60

\qquad \sf  \dashrightarrow \: x = 60 \div 10

\qquad \sf  \dashrightarrow \: x = 6 \degree

Correct choice is D

7 0
2 years ago
I need help on questions 2 please and thank you
EleoNora [17]
I would say B , even though I’m only in 5 th grade
8 0
3 years ago
TRANSLATE EACH SENTENCE INTO AN EQUATION.
Oksanka [162]
7.
The Pacific Ocean = 46% of Earth (P = 46%)
The Land on Earth = 54% of Earth (E = 54%)

8.
One Fence Per Yard = $1.75

$73.50 - $3.50 (The Tax) = $70

$70 Divided by $1.75 = 40 Yards


5 0
3 years ago
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