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3 years ago

WILL GIVE BRAINLIEST, PLS HELP

Mathematics

2 answers:

marusya05 [52]3 years ago

7 0

My answers were

d=2.6

c=1.45

kvv77 [185]3 years ago

7 0

4c+2d= 11

3.5d=41-22c

Bring 22c to the left hand side . The sign changes from negative to positive.

4c+2d=11

22c+3.5d=41

Multiply the first equation by 22. Multiply the second equation by 4 . I am eliminating c first

88c + 44d= 242

88c +14d=164

Then minus for the two questions.

30d= 78f

d= 78 /30

Then divide the two numbers by 6

d= 13/5

d=2.6

Next find c

The next step is substitution into any of the two equations.

4c +2d=11

4c+2( 2.6) =11

4c +5.2=11

4c = 5.8

c =1.45

Final answer: (1.45 , 2.6)

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ALOT OF POINT NEED HELP QUICK AND FAST

Finger [1]

Answer:

A true

B false

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D true

5 0

2 years ago

X-2y=18 2x+y=6 parallel perpendicular or neither

sergey [27]

<h3>Therefore they are perpendicular.</h3>

Step-by-step explanation:

A equation of line is

y =mx +c

Here the slope of the line is m.

Given equations are

x - 2y = 18

⇔-2y = -x +18

$\Leftrightarrow y =\frac{1}{2} x -9$ ............(1)

and 2x + y = 6

⇔y = -2x +6 ............(2)

Therefore the slope of equation (1) is $(m_1)$ = $\frac{1}{2}$

Therefore the slope of equation (2) is $(m_2)$ = -2

If two lines are perpendicular, when we multiply their slope we get -1.

therefore,

$m_1. m_2$ = $\frac{1}{2}$ . (-2) = -1

Therefore they are perpendicular.

4 0

2 years ago

3.<br>June has 248 oranges. She sells of these oranges. How many oranges did June sell?<br>Answer.

uranmaximum [27]

Answer:

93. Divide 248 by 8. One eighth of 248 = 31.

June sold 3/8 of the 248 oranges.

If 1/8 = 31 and June sold 3/8 of the oranges.

Multiply 3 × 31. Therefore June sold 93 oranges.

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Which expression is equivalent to (144k^2r^14)1/2 for all positive values of k and r?

FrozenT [24]

Answer: B

Step-by-step explanation:

4 0

3 years ago

temperature at 4 am was -13 degrees the temperature was rising at a steady rate of 5 degrees an hour. at what time will the temp

patriot [66]

Change in temperature = 12 - (-13) = 12 + 13 = 25
Number of hours = 25/5 = 5 hours.
Required time = 4 am + 5 hours = 9.am

6 0

3 years ago