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Drupady [299]
2 years ago
12

(-4 + 4r)(-7) someone please help

Mathematics
2 answers:
kvasek [131]2 years ago
4 0
You can do that on Photomath
Novosadov [1.4K]2 years ago
3 0

Answer:

−28+28

Step-by-step explanation:

1)Rearrange terms

(−4+4)(−7)

(4−4)(−7)

2)Re-order terms so that constants are on the left

(4−4)(−7)

−7(4−4)

3)Distribute

−7(4−4)

−28+28

Solution

−28+28

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Answer asap please will mark as brainlist
Leona [35]

Answer:

Exact Form:

√ 30

Decimal Form:

5.47722557 …

Step-by-step explanation: i would go with D

6 0
3 years ago
Please help me with number 1
andreev551 [17]

If I’m correct, then the answer is D. Someone please correct me if I’m wrong.

7 0
3 years ago
Let f(x, y) = (x + y)e x 2−y 2 and R be the rectangle enclosed by the lines x − y = 0, x − y = 2, x + y = 0, and x + y = 3.
dalvyx [7]

Answer:

(1/4)*(e⁶ - 7)

Step-by-step explanation:

a) Given

x − y = 0  if  x = 0  ⇒  y = 0

x − y = 2  if  x = 0  ⇒  y = -2;  if  y = 0   ⇒  x = 2

x + y = 0  if  x = 0   ⇒  y = 0

x + y = 3  if  x = 0  ⇒  y = 3;  if  y = 0   ⇒  x = 3

then we show the region R in the pics 1 and 2.

b) We make the change of variables as follows

u = x + y

v= x - y

If

x - y = 0  ⇒ v = 0

x − y = 2  ⇒ v = 2

x + y = 0  ⇒ u = 0

x + y = 3  ⇒ u = 3

Where u is the horizontal axis and v is the vertical axis, the new region S is shown in the pic 3.

c) We evaluate ∫∫R (x + y)*e∧(x² - y²)dA

The procedure is shown in the pic 4, where we have to calculate the Jacobian in order to use it to get the answer.

7 0
3 years ago
Find a ∩ b if a = {2, 5, 8, 11, 14} and b = {1, 3, 5, 7}. {1, 2, 3, 5, 7, 8, 11, 14} {5}
Maslowich

The intersection of given set a and b is a∩b = {5}.

According to the given question.

We have two sets a and b.

a = {2, 5, 8, 11, 14}

And, b = {1, 3, 5, 7}

As, we know that "the intersection of two sets A and B is the set of all those elements which are common to both A and B. Symbolically, we can represent the intersection of A and B as A ∩ B".

Since, only the element which is common to set a and set b is 5.

Thereofore, the intersection of given set a and b is given by

a∩b = {5}

Find out more information about intersection of sets here:

brainly.com/question/14679547

#SPJ4

8 0
2 years ago
I need some help please
Diano4ka-milaya [45]
What’s your question
4 0
3 years ago
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