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3 years ago

Plz Help ASAP Must be simplified

Mathematics

1 answer:

Goshia [24]3 years ago

3 0

Answer:

cos (s)

Step-by-step explanation:

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A company sells phone cases for $15 each. At the end of the week, they have sold $570 worth of phone cases. How many phone cases

Over [174]

Answer:

They sold 38 phone cases.

Step-by-step explanation:

The equation I used to solve is

$570 \div 15$

3 0

3 years ago

Code. -3x + 4y = -8 8x - y = 16 Solving systems by substitution

LiRa [457]

Answer:

The solution to the system of equations is $\displaystyle \big(\frac{56}{29}, -\frac{16}{29}\big)$ .

Step-by-step explanation:

We are given a system of equations:

$\displaystyle \left \{ {{-3x+4y=-8} \atop {8x-y=16}} \right.$

We need to solve these by substitution, so we need to solve one equation for a variable and then substitute the value of that variable into the other equation.
After doing this and solving for the opposite variable, we need to insert this into the original equation and solve for the initial variable.
Therefore, to solve one of the equations, we will solve it to put it in slope-intercept form and solve for y. The easier equation to work with is equation two.

$\displaystyle 8x - y = 16\\\\-y = -8x + 16\\\\\frac{-y}{-1}=\frac{-8x+16}{-1}\\\\y = 8x - 16$

Now, we've solved for y. So, we can substitute this into either equation and solve for x.

$\displaystyle -3x + 4(8x -16)=-8\\\\-3x + 32x - 64 = -8\\\\29x - 64 = -8\\\\29x = 56\\\\\frac{29x}{29}=\frac{56}{29}\\\\x = \frac{56}{29}$

Now, we substitute our value for x into one of the original equations and solve for y.

$\displaystyle 8\big(\frac{56}{29}\big)-y=16\\\\-y = 16 - 8\big(\frac{56}{29}\big)\\\\-y=\frac{16}{29}\\\\\frac{-y}{-1}=\frac{\frac{16}{29}}{-1}\\\\y = -\frac{16}{29}$

Therefore, the solution to our system of equations is:

$\displaystyle \big(\frac{56}{29}, -\frac{16}{29}\big)$

8 0

3 years ago

A square table in the cafeteria has the dimensions shown. What is the length of the diagonal of the table? Round to the nearest

kotykmax [81]

Answer: 11.31

Step-by-step explanation:

6 0

3 years ago

Help! Factor the expressions. x^2 + 5x − 6 =

xz_007 [3.2K]

Answer:

(x−1)(x+6)

Step-by-step explanation:

3 0

4 years ago

Read 2 more answers

What percent of 60 is 12? Show your work.

Semmy [17]

Percent formula : is/of = %/100
is = 12
of = 60
% = x
now we sub

12/60 = x/100
cross multiply
(60)(x) = (12)(100)
60x = 1200
x = 1200/60
x = 20

check..
0.20(60) = 12
12 = 12 (correct)

so 20% of 60 is 12

7 0

3 years ago

Read 2 more answers