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3 years ago

What is the solution to the system of equations shown below?

Mathematics

1 answer:

elena55 [62]3 years ago

3 0

Answer:

x= 1

y= -2

This is the solution, so the answer is D

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Anna found the difference between thirteen and the product of four and a number. Which expression represents this phrase, and wh

Elan Coil [88]

The first thing we must do for this case is to define a variable.
We have then:
n: unknown number.
We write the algebraic expression:
13 - 4n
For n = 3 we have:
13 - 4 (3) = 13 - 12 = 1
Answer:
An expression that represents this phrase is:
13 - 4n
its value if n = 3 is:
1

8 0

3 years ago

Read 2 more answers

What are irrational numbers?<br> Are they related to Rational numbers?

emmainna [20.7K]

An irrational number is a number that cannot be expressed in a fraction form while a rational number can.

an example of an irrational numbers are repeating numbers such as 0.77777... and examples of rational numbers are decimals such as 0.20, whole numbers such as 5, and fractions like 2/3

hope this helps a bit.

4 0

3 years ago

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If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%

ehidna [41]

Answer:

The price will be $105.47

Step-by-step explanation:

Given that i purchase a product for $79.99 and two accessories for $9.99 and $7.00. we have to find how much will i owe after taxes applies 8.75%

Now, the cost price of the product and the two accessories will be

$79.99+$9.99+$7.00

= $96.98

Now, also the tax applies at the rate 8.75%

∴ $Tax=8.75\%\thinspace of\thinspace96.98$

= $8.48575=8.49(approx)$

Hence, the price which i owe after taxes will be $96.98+$8.49=$105.47

8 0

3 years ago

Brianna goes to the movies and must pay a 7% tax on the items she gets. She gets popcorn, soda, and twizzlers. These items come

alina1380 [7]

Find the amount of tax money she needed to pay

7% of 17.50

=7/100 * 17.50

=122.50/100

=1.22

Find the final sales price

17.50+1.22 = 18.72

5 0

3 years ago

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A rock is thrown upward with an initial velocity of 16 ft/s from an initial height of 5 ft. How much time does it take for the r

Bogdan [553]

Check the picture below.

so it hits the ground when y = 0, thus

$\bf ~~~~~~\textit{initial velocity}\\\\
\begin{array}{llll}
~~~~~~\textit{in feet}\\\\
h(t) = -16t^2+v_ot+h_o
\end{array} 
\quad 
\begin{cases}
v_o=\stackrel{16}{\textit{initial velocity of the object}}\\\\
h_o=\stackrel{5}{\textit{initial height of the object}}\\\\
h=\stackrel{}{\textit{height of the object at "t" seconds}}
\end{cases}$

$\bf h(t)=-16t^2+16t+5\implies \stackrel{h(t)}{0}=-16t^2+16t+5
\\\\\\
16t^2-16t-5=0\implies (4t+1)(4t-5)=0\\\\
-------------------------------\\\\
4t+1=0\implies 4t=-1\implies t=-\cfrac{1}{4}\\\\
-------------------------------\\\\
4t-5=0\implies 4t=5\implies t=\cfrac{5}{4}\implies \boxed{t=1\frac{1}{4}}$

since "t" is seconds it took, it can't be a negative amount.

5 0

3 years ago