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2 years ago

What is the answer to −8×(−10)−7× −1 1?

Mathematics

2 answers:

pickupchik [31]2 years ago

3 0

I believe the answer is 157

professor190 [17]2 years ago

3 0

I solved this also got 157!

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Look at the statement below.

leva [86]

I honestly think it's If a number is not a multiple of 4 it is not divisible by 2 but I am not really sure :(?

4 0

3 years ago

What condition renders this true, where S and T are sets?

daser333 [38]

Answer:

There are no sets S, T for which

$S \cup T^c=S^c\cap T$

holds

Step-by-step explanation:

Let the set A be

$A=S\cup T^c$

By de De Morgan's Law

$A^c=S^c\cap ((T)^c)^c$

But

$((T)^c)^c=T$

$A^c=S^c\cap T$

We conclude that

$S \cup T^c=S^c\cap T\Rightarrow A=A^c$

which is a contradiction because no set is equal to its complement.

3 0

3 years ago

I need help on this question 7 - (-19) - 18 + (-19) + 18

makvit [3.9K]

Answer:

Step-by-step explanation:

Work with PEMDAS

(Subtracting a negative from a negative is the same thing as adding)

7-(-19)-18+(-19)+18

7-(-19)=26

-18+(-19)=-37

26-37+18= 7

8 0

3 years ago

Read 2 more answers

Who knows the x and y values of<br> x+5y=-12<br> 5x+4y=24

musickatia [10]

Solve for one variable x or y first. So lets solve for x. If you take the first equation x= -12 -5y. You then plug that into the second equation
5(-12-5y) +4y = 24
now you solve for y
-60 - 25y + 4y =24
-21y=84
y=-4
Now you plug in y back into either equation and you get x=8

7 0

3 years ago

Suppose x and y are nonzero vectors in an inner product space. Show that x and y are orthogonal if and only if ||x+y|| = ||x-y||

harkovskaia [24]

Answer:

Step-by-step explanation:

Suppose x and y are nonzero vectors in an inner product space.

Let us assume that x and y are orthogonal

i.e. innter product is 0.

This implies dot product of x and y is 0

Then x.y =0

i.e. $x^2+y^2 +2x.y = x^2+y^2-2x.y\\||x+y||=||x-y||$

Proved

Converse part:

Let $||x+y||=||x-y||$

Square also would be equal

$||x+y||^2=||x-y||^2\\||x||^2+||y||^2+2x,t=||x||^2+||y||^2-2x.y\\x.y =0$

Hence inner product of x and y is 0

7 0

3 years ago

What is the answer to −8×(−10)−7× −1 1? ​

What is the answer to −8×(−10)−7× −1 1?