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pochemuha
4 years ago
10

Correct answers only please!

Mathematics
2 answers:
Digiron [165]4 years ago
6 0

Answer:

a) 6.67 in.

Step-by-step explanation:

The aspect ratio of chalkboard =4:3    [length:width=4:3]

The width = 5 in.

the length = L

so,

4:3=L:5

⇒4/3 = L/5

⇒(4 x 5)/3= L

⇒20/3 = L

⇒ 6.67 =  L

∴ The length of the chalkboard 6.67 in.

k0ka [10]4 years ago
6 0

Answer:

a) 6.67 in.

Step-by-step explanation:

The aspect ratio of chalkboard =4:3    [length:width=4:3]

The width = 5 in.

the length = L

so,

4:3=L:5

⇒4/3 = L/5

⇒(4 x 5)/3= L

⇒20/3 = L

⇒ 6.67 =  L

∴ The length of the chalkboard 6.67 in.

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Solve the Quadratic Equation
UNO [17]

Answer:

-4.54 and 1.54

Step-by-step explanation:

This is a quadratic equation

Let Δ be our discriminant :

  • a= 1
  • b= 3
  • c= -7
  • Δ = 3²-4*1*(-7)= 37≥0

so we have two solutions : x and y

x =( -3-\sqrt{37})/2 = -4.54

y= ( -3+\sqrt{37})/2= 1.541

then the solutions are -4.54 and 1.54

7 0
3 years ago
Evaluate A + 3B if possible. HELP ASAP!
madreJ [45]

Answer:

Not possible.

Step-by-step explanation:

Addition of Matrix A and Matrix B is possible only if the order of matrix A is same as the order of matrix B.

Order of a matrix with m rows and n columns is m\times n.

Here, matrix A is \left[\begin{array}{ccc}2&-4\\-4&10\\0&-8\end{array}\right]

Matrix B is \left[\begin{array}{ccc}0&-4&6\\2&-10&4\end{array}\right].

Multiplying a matrix by a constant doesn't change its order.

So, order of matrix A is 3\times 2 as it has 3 rows and 2 columns.

The order of matrix 3B is 2\times 3 as it has 2 rows and 3 columns.

Therefore, addition is not possible as the order is different.

4 0
4 years ago
108t^2-60t <br><br> factor the polynomial
Anastaziya [24]
Factor out 12t to get 12t(9t-5)
5 0
3 years ago
What is the equation of a circle with the center at (-4,12) and a radius of square root of 3
Wittaler [7]

Answer:

(x + 4)² + (y - 12)² = 3

Step-by-step explanation:

form of circle

(x - h)² + (y - k²)  = r²

(h, k) is the center = (-4, 12

r is the radius =√3

------------------------

plug in the givens

(x + 4)² + (y - 12)² = 3

6 0
3 years ago
Use the information below to find the measure of angle a such that triangle abc is similar to triangle def measure of angle b=25
Kamila [148]
<span>triangle abc is similar to triangle def
</span>
m<b = m<e = 25
so
m<d = m<a = 45

answer:

<span>measure of angle a= 45 degrees</span>
5 0
3 years ago
Read 2 more answers
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