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4 years ago

(4x+2y=4 (6x +2y=8 Solve by elimination

Mathematics

1 answer:

lyudmila [28]4 years ago

7 0

Answer: Y=1

Step-by-step explanation:

<h2><u><em>Hope this helps</em></u></h2>

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What is the difference of the whole number and the mixed number with an improper fraction below? 8 7/4 -7 A. 2 1/2 B. 2 3/4 C. 4

MatroZZZ [7]

Answer:

D. 2 1/4

Step-by-step explanation:

8 7/4 - 7

9 3/4 - 7

2 1/4

6 0

3 years ago

Calculeaza valorile lui a si b a+b=42 a impartit la b=5

a_sh-v [17]

A + 5 = 42
-5 -5
A = 37

5 0

3 years ago

1. Consider the surface area of the pyramid shown.

Butoxors [25]

A) ...
I don’t how to do but b) I know

b) ________________
/ (10 ✖️10)-(1.5 ✖️1.5)
\/. =9.887

(3✖️3)+4(1/2✖️3 ✖️9.887)
=9+59.322
=68.322
Answer is 68.322
I think
Also sorry I didn’t do a) because I really don’t how to do so...

6 0

3 years ago

Read 2 more answers

The University of Texas at Austin has three times as many students enrolledas the University of Miami. The University of Califor

harina [27]

Answer:

University of Texas has 46,500 students, University of California has 34,000 students and University of Miami has 15,500 students.

Step-by-step explanation:

Represent Texas with T, Miami with M and California with C. With the given information, the following equations were obtained.

T = 3 × M

T – 3M = 0 ………………………….(i)

C = 3,000 + 2 × M

C – 2M = 3,000…………………..(ii)

T + C + M = 96,000…………….(iii)

By rearranging, we have:

1T + 0C – 3M = 0 ………………………….(i)

0T + 1C – 2M = 3,000…………………..(ii)

1T + 1C + 1M = 96,000………….…….(iii)

The Augmented Matrix is:

$\left[\begin{array}{ccc}1&0&-3\\0&1&-2\\1&1&1\end{array}\right]$ $\left[\begin{array}{ccc}T\\C\\M\end{array}\right]$ = $\left[\begin{array}{ccc}0\\3,000\\96,000\end{array}\right]$

Making $\left[\begin{array}{ccc}T\\C\\M\end{array}\right]$ the subject of the formula we have:

$\left[\begin{array}{ccc}T\\C\\M\end{array}\right]$ = $\frac{\left[\begin{array}{ccc}0\\3,000\\96,000\end{array}\right]}{\left[\begin{array}{ccc}1&0&-3\\0&1&-2\\1&1&1\end{array}\right]}$

Let’s say matrix A = $\left[\begin{array}{ccc}1&0&-3\\0&1&-2\\1&1&1\end{array}\right]$ , the inverse of matrix A = $\left[\begin{array}{ccc}\frac{1}{2} &-\frac{1}{2} &\frac{1}{2} \\-\frac{1}{3} &\frac{2}{3} &\frac{1}{3} \\-\frac{1}{6} &-\frac{1}{6} &\frac{1}{6} \end{array}\right]$ is determined by the formula $\frac{Adjoint(A)}{determinant(A)}$ . This can also be computed directly on a scientific calculator.

$\left[\begin{array}{ccc}T\\C\\M\end{array}\right]$ = $\left[\begin{array}{ccc}\frac{1}{2} &-\frac{1}{2} &\frac{1}{2} \\-\frac{1}{3} &\frac{2}{3} &\frac{1}{3} \\-\frac{1}{6} &-\frac{1}{6} &\frac{1}{6} \end{array}\right]$ $\left[\begin{array}{ccc}0\\3,000\\96,000\end{array}\right]$

= $\left[\begin{array}{ccc}46,500\\34,000\\15,500\end{array}\right]$

T = 46,500

C = 34,000

M = 15,500

6 0

4 years ago

Read 2 more answers

F the base is 4, what is the value if the exponent is 2? What if the exponent is -2?

nasty-shy [4]

Answer:

Step-by-step explanation:

value of 4, and you want to square it or exponent 2

so 4^2 = 4x4

=16

What is ^-2

It does the same operation however because to is negative it really means putting 4 in the denominator so 2 becomes positive. Inverse of the exponent 2

1/4^2 is the same as 4^-2

which will both give 1/16

5 0

3 years ago