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antiseptic1488 [7]
3 years ago
8

Write the equation so that y is a function of x. 5x + 4y - 7 = 5

Mathematics
1 answer:
liubo4ka [24]3 years ago
3 0

5x  + 4y - 7 = 5 \\ 5x + 4y = 5 + 7 \\ 5x + 4y = 12 \\ 4y = 12 - 5x \\ y =  \frac{12}{4}  -  \frac{5x}{4}  \\ y = 3 -  \frac{ 5x}{4}
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Solve: 6 - x=-12 )<br> A) -18 <br>B) C 0 <br>D) 18​
Luda [366]

Answer:

D) 18

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable

4 0
3 years ago
The density of pure solid copper is 8.94 g/mL. What volume does 5 kg of copper occupy. Please help
mel-nik [20]


<u><em>Density= Mass divided by Volume</em></u>, but you're trying to find Volume so you apply Algebra and get <u><em>Volume= Mass divided by Volume.</em></u>

Volume= 0.5592841163 [kg/m (power to the 3)]

You should round it up

5 0
4 years ago
Find the equation of the graphed line.
Kamila [148]

Answer:

y = -x + 4

Step-by-step explanation:

Mathematically, the equation of a straight line is;

y = mx + b

where m is the slope and b is the y-intercept

from the plot, the y intercept is 4

So we have;

y = mx + 4

To get the value of m, we substitute the coordinates of any point and solve for m

we select the point; (4,0)

so;

0 = m(4) + 4

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4m = -4

m = -1

so the equation of the line is;

y = -x + 4

8 0
3 years ago
Claire is buying a new bicycle for 295 if the sales tax is 4.75% what will she pay in this total
yawa3891 [41]

Answer:

the answer 14.0125. rounded = 14

Step-by-step explanation:

convert the percentage to a decimal

4.75% --> move two decimal places --> 0.0475

multiply 295*0.0475

= 14.0125

6 0
3 years ago
Two sides of a triangle are equal in length. The length of the third side is three meters less than the sum of the lengths of th
strojnjashka [21]
We have an isosceles triangle: 
The length of the sides are:
side₁=side₂=x
side₃=(x+x)-3=2x-3
Perimeter of a triangle=is the sum of the all sides.

we have this equation:
x+x+(2x-3)=29
4x=29+3
4x=32
x=32/4
x=8

The length of the third triangle will be: 2x-3=2*8-3=16-3=13

Answer: The length of the longest side of the triangle would be 13 meters. 
4 0
3 years ago
Read 2 more answers
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