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3 years ago

30 tens - 3 tens 3 tenths

1 answer:

4 0

the expression 30 tens - 3 tens 3 tenths. A number proceeded by "tens" means that the number is multiplied by 10 while "tenths" means that the number is divided by 10. 30*10 - 3*10*3/10 equal to 300 - 9 or 291.

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Select correct answers multiple choice

Darina [25.2K]

The answer to the question is c

5 0

4 years ago

Find the value of x. 7, 8, and 9 please!

natima [27]

Answer:

7) x= 5, 8) x= 6, 9) x= 7

Step-by-step explanation:

As per the secant theoram, if two secant intersect outside the circle then the product of the exterior secant and total length of each secant are equal.

7) ∴ $(x+3)\times 3= (10+2)\times 2$

opening parethesis and distributing 3 with x and 3.

⇒ $3x+9=24$

subtracting 9 on both side.

⇒ $3x=15$

cross multiplying

∴ x= 5.

8) $(3+5)\times 5= (x+4)\times 4$

Opening parethesis and distributing 4 with x and 4.

⇒ $8\times 5=4x+16$

⇒ $40=4x+16$

subtracting 16 on both side.

⇒ $24=4x$

cross multiplying

∴ x= 6.

9) $(x+5)\times 5= (6+4)\times 6$

opening parethesis and distributing 5 with x and 5.

⇒ $5x+25=60$

subtracting 25 on both side.

⇒ $3x=35$

cross multiplying

∴ x= 7.

6 0

3 years ago

Factor x2 + 4x + 4! Please help!

Luden [163]

This is a whole squared equation. So, it is (x+2)^2.
If you check it, you get x2 + 4x + 4

Hope this helps!

5 0

4 years ago

Read 2 more answers

Solve the following system of equations.

sasho [114]

X is minus 2
y is equal to 1

4 0

4 years ago

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