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3 years ago

My smart friends couldn't even figure this out.

Mathematics

2 answers:

solmaris [256]3 years ago

8 0

It’s D and F multiplying by two is the same as dividing by one half.

Otrada [13]3 years ago

6 0

The answer would be c, since youre dividing 1/3 cup of oil into 2 lamps

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On a map 1 cm represents 4.5km. What is the actual distance between two towns which are 4cm apart on the map?

rosijanka [135]

Answer:

18km

Step-by-step explanation:

1cm:4.5km/4cm then get the answer as 18km

5 0

3 years ago

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Solve the system of equations algebraically.

nordsb [41]

Answer: D

Step-by-step explanation:

$4x-3y=8\\5x-4y=5$

Let's take one of the equations and solve for a variable to use the substitution method.

$5x-4y=5\\5x=5+4y\\x=\frac{5+4y}{5}$

Now replace this in the first equation.

$4x-3y=8\\4(\frac{5+4y}{5})-3y=8\\\frac{20+16y}{5}-3y=8$

Separate the terms.

$\frac{20}{5}+\frac{16y}{5}-3y=8$

Solve 20/5

$4+\frac{16y}{5}-3y=8$

Subtract 4 from both sides to isolate y.

$4-4+\frac{16y}{5}-3y=8-4$

$\frac{16}{5}y-3y=4$

Solve the difference.

$\frac{16-(3)(5)}{5}y=4\\$

$\frac{16-15}{5} y=4$

$\frac{1}{5}y=4$

Multiply by the reciprocal or the inverted fraction that is next to y to isolate it.

$(\frac{5}{1} )(\frac{1}{5})y=4(\frac{5}{1})$

$y=20$

Now, in order to find x, replace y in any of the two equations.

$5x-4y=5\\5x-4(20)=5\\5x-80=5\\5x=5+80\\5x=85\\x=\frac{85}{5}\\x=17$

7 0

3 years ago

Let z = 19 + i and w = 4 + 10i.

MrRissso [65]

Answer:

C) Apply the distributive property

3 0

3 years ago

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What is the positive solution to the equation 4x^2 + 12x = 135

serg [7]

Answer:

You can't do that is an error if you want to do that you would get it wrong but the only way to do that is 4x2+12x135 which equals 1628

Step-by-step explanation:

I multplyed 4x2 first then 12x135 then added both of them together which gave me 1628

3 0

4 years ago

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Choose the point-slope form of the equation of this line.

igor_vitrenko [27]

Answer:

y= -5x +7

Step-by-step explanation:

We can see points on the graph:

(2, -3) and (3, -8)

The function in general form is:

y= mx+b

Let's find the slope and y-intercept as per identified points on the graph:

m= (y1-y1)/(x2-x1)

m= (-8+3)/(3-2)= -5

b= y- mx

b= - 3 -(-5)*2= -3 +10= 7

Based on the found values of m and b, the given line is:

y= -5x +7

4 0

3 years ago

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