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jeka57 [31]
2 years ago
7

Solve the system with substitution 72 +10y = 36 y = 2x + 9

Mathematics
1 answer:
mr_godi [17]2 years ago
8 0

Answer:

x= -63 y= -117

Step-by-step explanation:

72+10(2x+9)=36

72+20x+90=36

162+20x=36

20x=-126

×= -63

y= 2(-63)+9

y=-126+9

y= -117

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explain how it is possible that all proportional relationships are linear functions but not all linear functions are proportiona
OLEGan [10]

Proportional and linear functions are almost identical in form. The only difference is the addition of the “b” constant to the linear function. Indeed, a proportional relationship is just a linear relationship where b = 0, or to put it another way, where the line passes through the origin (0,0).

You’re welcome

6 0
3 years ago
What is the measure of angle DOC, given that AB is congruent to DC
pickupchik [31]

Answer:

D. 65 degrees

Step-by-step explanation:

If two sides are congruent the corresponding angles are also congruent

5 0
3 years ago
Please solve this question withvfull process i will wark as braineast a) After allowing 5 % discount on the marked price of a ra
schepotkina [342]

Answer:

Let the marked price be x

Discount % = 10%

Discount = 10\% \times x = 0.1x10%×x=0.1x

Cost after discount = x-0.1x = 0.9x

10%vat is charged on it

Cost including VAT = 0.9x+0.1(0.9x)=0.99x0.9x+0.1(0.9x)=0.99x

We are given that  it's price became rs 1672

So, 0.99x = 1672

x=\frac{1672}{0.99}x=0.991672

x=1688.88

Discount = 0.1x=0.1(1688.88)=168.888

Hence The discount

7 0
3 years ago
1400 dollars is placed in an account with an annual interest rate of 5.5%. to the nearest year, how long will it take for the ac
olga_2 [115]

It will take 19 years and 6 months for the account value to reach 2900 dollars

Step-by-step explanation:

Given

Principal amount = 1400 dollars

Rate = 5.5 %

Final value = A = 2900

We have to find t

So,

The formula for simple interest is:

A = P(1+rt)

Putting values

2900 = 1400(1+0.055.t)\\\frac{2900}[1400} = 1+0.055t\\2.071 = 1+0.055t\\2.071-1=0.055t\\1.071 =0.055t

Dividing both sides by 0.055

\frac{0.055t}{0.055} = \frac{1.071}{0.055}\\t = 19.47\ years

Rounding off to nearest tenth

19.5 years

Hence,

It will take 19 years and 6 months for the account value to reach 2900 dollars

Keywords: Interest, simple interest

Learn more about interest at:

  • brainly.com/question/2654504
  • brainly.com/question/2654231

#LearnwithBrainly

6 0
3 years ago
The sum of two numbers is 62 the smaller number is 6 less than the larer number what are the numbers
muminat
X= larger number
x-6= smaller number

x + (x - 6)= 62
combine like terms

2x - 6= 62
add 6 to both sides

2x= 68
divide both sides by 2

x= 34 larger number


SMALLER NUMBER
x - 6= 34 - 6= 28


ANSWER: The smaller number is 28 and the larger number is 34.

Hope this helps! :)
5 0
3 years ago
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