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2 years ago

5x+3y=17 x+y=4 substitution

Mathematics

1 answer:

solmaris [256]2 years ago

4 0

Group the xs and the ys, 17+5= 22x 3+1=4y so y=4 and x=22.

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The formula F=9/5C+32 converts temperatures from Celsius C to Fahrenheit F. A. Solve the formula for C b. The boiling point of w

liraira [26]

Answer:

(a) $\therefore C=\frac59(F-32)$

(b)The boiling point of water in Celsius scale is 100°C.

(c)The setting in Celsius scale is 26.7°C.

Step-by-step explanation:

Given that,the formula is

$F=\frac95 C+32$ ......(1)

(a)

Given that,

$F=\frac95 C+32$

$\Rightarrow F-32=\frac95 C+32-32$ [ subtracting 32 from both sides]

$\Rightarrow F-32=\frac95 C$

$\Rightarrow \frac95 C=F-32$

$\Rightarrow C=\frac59(F-32)$ ......(2) [Multiplying $\frac59$ ]

$\therefore C=\frac59(F-32)$

(b)

Given that, the boiling point of water is 212°F.

Putting F=212 in equation (2)

$\therefore C=\frac59(212-32)$

$\Rightarrow C=\frac59\times 180$

$\Rightarrow C=5\times 20$

$\Rightarrow C=100$

The boiling point of water is 100°C.

(c)

Given that, a house thermostat is set at 80 degree.

Putting F=80 in equation (2)

$\therefore C=\frac59(80-32)$

$\Rightarrow C=\frac59\times 48$

$\Rightarrow C\approx26.7$

The setting in Celsius scale is 26.7°C.

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3 years ago

The functions f(x) and g(x) are shown on the graph.

goldfiish [28.3K]

Answer:Soo really I could give a fucif u believe me or not but the answer is d

Step-by-step explanation:

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3 years ago

Nate's weekly pay increased from $710 to $770. Which of the following is closest to the

Lemur [1.5K]

Answer:

The answer is 8.5 hope this helped.

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solong [7]

Maybe something like:
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You can use x and y instead of s for student and a for adult.
Are the adults and students charged the same? If so then:
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3 years ago

Read 2 more answers

ratelena [41]

C the correct answer is C

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3 years ago