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3 years ago

WILL GIVE THE BRAINLIEST! & LIKE

1 answer:

8 0

1) combine like terms (k)
0 = 7k
k = 0/7 = 0
zero divided by any numbers will be zero

2) combine the like terms (the constant of -4 + 1)
9 = 6x - 3
add 3 to both sides
12 = 6x
x=2

3) -3+3=0
-4=v

4) 4+3=7
8=k+7
k=1

5)x-5x = -4x
16= -4x
x = -4

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Daniel can paint a house in 10 days, while his father can paint the same house in 6 days. If they work together, how long will t

Alex73 [517]

Answer:

3 $\frac{3}{4}$ days

Step-by-step explanation:

Let the amount of work be x.

Daniel:

10 days = x

1 day = $\frac{1}{10}$ x

Father:

6 days = x

1 day = $\frac{1}{6}$ x

Together:

1 day = $\frac{1}{10}$ x + $\frac{1}{6}$ x

= $\frac{6}{60}$ x + $\frac{10}{60}$ x

= $\frac{16}{60}$ x

= $\frac{4}{15}$ x

No. of days = $\frac{15}{15}$ x ÷ $\frac{4}{15}$ x

= $\frac{15}{15}$ x × $\frac{15}{4}$ x

= $\frac{225}{60}$

= 3 $\frac{3}{4}$

4 0

3 years ago

Give an example of a 2x2 matrix without any real eigenvalues:___________

9966 [12]

Answer:

Step-by-step explanation:

An eigenvalue of n × n is a function of a scalar $\lambda$ considering that there is a solution (i.e. nontrivial) to an eigenvector x of Ax =

Suppose the matrix $A = \left[\begin{array}{cc}-1&-1\\2&1\\ \end{array}\right]$

Thus, the equation of the determinant (A - $\lambda$ 1) = 0

This implies that:

$\left[\begin{array}{cc}-1-\lambda &-1\\2&1- \lambda\\ \end{array}\right] =0$

$-(1 - \lambda^2 ) + 2 = 0$

$-1 + \lambda ^2 + 2= 0$

$\lambda^2 +1 =0$

Hence, the eigenvalues of the equation are $\mathtt{\lambda = i , -i}$

Also, the eigenvalues can be said to be complex numbers.

3 0

3 years ago

What is 2(5-3x)+(x-10)

Alenkasestr [34]

Answer:

-5x

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Give me the of of a rectangular area that is 68 by 34

CaHeK987 [17]

Answer:

2,312

Step-by-step explanation:

area = two sides multiplyed together

68 x 34 = 2,312

3 0

3 years ago

If the cost of producing a product that sells for $50 is 120,000 plus $20.00 per piece, then how many products must be sold to b

Vadim26 [7]

Let
x--------->number of products
y1--------> the cost of producing a product
y2------> the cost of sell a product

we know that
y1=120,000+20x-------> equation 1
y2=50x------> equation 2

equate equation 1 and equation 2
120,000+20x=50x
50x-20x=120,000
30x=120,000
x=4000

the answer is
4000 pieces

4 0

3 years ago

**WILL GIVE THE BRAINLIEST! & LIKE**

WILL GIVE THE BRAINLIEST! & LIKE