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3 years ago

6

There are two unknowns you are trying to find, and you cannot express one in terms of the other. Describe how you could use alge

bra to solve for the unknowns.

1 answer:

serious [3.7K]3 years ago

4 0

Answer:

When you solve systems with two variables and therefore two equations, the ... of any variable is 1, which means you can easily solve for it in terms of the other ... In the substitution method, you use one equation to solve for one variable and ... Look for a variable with a coefficient of 1 … that's how you'll know where to begin.

Step-by-step explanation:

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Find measure of angle 2 - can someone help???

LiRa [457]

Answer:

44

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Which question is equivalent to 5+n

Dima020 [189]

Answer:

the answer would be n+5

Step-by-step explanation:

5n is the same as saying 5 multiplied by n

n +5 would equal the same number

for example if n=2 then 5+2=7

and if we used n+5 it would be 2+5=7

and if you plugin n=2 for all the equations the only correct one is N+5

7 0

3 years ago

Solve the following system of equations for a and for b:

viktelen [127]

Answer:

$a=3\\b=1$

Step-by-step explanation:

$9a+3b=30\\8a+4b=28$

Let's solve the second equation for a to later on replace it in the first equation.

$8a+4b=28\\8a=28-4b\\a=\frac{28-4b}{8}$

Now plug this into the first equation.

$9a+3b=30\\9(\frac{28-4b}{8})+3b=30$

Distribute the 9

$(\frac{252-36b}{8}) +3b=30$

Break down the fraction.

$\frac{252}{8}-\frac{36b}{8}+3b=30$

Simplify.

$\frac{63}{2}-\frac{9}{2}b+3b=30$

Subtract $\frac{63}{2}$

$-\frac{9}{2}b+3b=30-\frac{63}{2}$

Combine like terms.

$\frac{-9+2*3}{2}b=\frac{30*2-63}{2}$

$\frac{-9+6}{2}b=\frac{60-63}{2}$

$\frac{-3}{2}b=\frac{-3}{2}$

Muliply by the reciprocal or inverted fraction next to b.

$(-\frac{2}{3})(-\frac{3}{2}) b=-\frac{3}{2}(-\frac{2}{3})$

$b=1$

Now plug this value into any of the equations to find the value of a.

$8a+4b=28\\8a+4(1)=28\\8a+4=28\\8a=28-4\\8a=24\\a=\frac{24}{8}\\ a=3$

5 0

4 years ago

Amelia and Jayden work at a furniture store. Amelia is paid $185 per week plus 9.5% of her total sales in dollars, xx, which can

almond37 [142]

Answer:

The weekly sales must be $12,600

Step-by-step explanation:

if their pay is the same, the equations have to be equal

amelia = jayden

185 +.095x = 311 +.085x

subtract .085x from each side

185 +.095x-.085x = 311 +.085x-.085x

185+.01x = 311

subtract 185 from each side

185-185+.01x = 311-185

.01x = 126

divide by .01

.01x/.01 = 126/.01

x = 12600

7 0

3 years ago

What is the constant of proportionality that relates the number of cookies made, y, to the number of cups of sugar used, x ? A r

dmitriy555 [2]

Answer:

24

Step-by-step explanation:

Direct variation (with constant of proportionality) has the form:

$A=kB$

Where,

A & B are the 2 variables being compared
$k$ is the constant of proportionality

Using cookies, $y$ , and sugar, $x$ , we can write:

$y=kx$

Substituting $y=96$ and $x=4$ , and solving for $k$ , we have:

$96=k(4)\\\frac{96}{4}=k\\k=24$

Thus, constant of proportionality is 24

3 0

3 years ago