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Blababa [14]
3 years ago
8

2 – Efetue:

Mathematics
1 answer:
BartSMP [9]3 years ago
5 0

A) 7x(-5)

A multiplicação de um numero positivo por um numero negativo resulta em um numero negativo: (+) x (-)=(-)

(7x5)

Multiplique os valores

-35

resposta para  A: -35

B)(-9)x(-8)

A multiplicação dois números negativos resulta em um numero positivo : (-)x(-)=(+)

9 x 8

Multiplique os valores

72

Resposta para B :72

C)(-15) : 5

A divisão de um numero negativo por um positivo resulta em um numero negativo: (-):(+)=(-)

-(15:5)

Divida os números

-3

Resposta para C: -3

D) 125 : 25

Divida os números

5

Resposta para D: 5

POR FAVOR ME MARCA BRAINLIEST

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Simplify the expression 3+2^2 / 2+3
vredina [299]

Ans

8 option b.

Step-by-step explanation:

3+4/2+3

=3+2+3

=5+3

=8

3 0
3 years ago
What is the complete factorization of x^2+4x-45?​
erma4kov [3.2K]

Answer:(x-5)(x+9)

Step-by-step explanation:

You want two numbers that can give you -45 in multiplication and two numbers that can add to 4 and that is -5 and 9.

5 0
3 years ago
Read 2 more answers
Help I need help on this question
nikitadnepr [17]

Answer:

x = 8

FE = 54

Its Acute, Isosceles triangle

Step-by-step explanation:

Well you have to do this out of order and use some knowledge about questions, (It always helps.)

Lets do 12 first:

If this were a scalene triangle, you wouldn't be able to solve for it. Because no sides are equal and this isn't equilateral, because it only shows two equal angles. Therefore it is Isosceles.

Also, if this were a right triangle we would see the little square for an angle. It isn't obtuse because if you look at the triangle and its angles it isn't wider than the square (this only works on the ones that are to scale like this one) So again by elimination and some knowledge of the question we figure out that it is an acute scalene triangle

Now we try and find X. Because Angles F, and E are equal, we can make the two sides equal to each other and solve for x.

Add 24 on both sides

8x - 24 = 40

     +24  +24

Divide by 8 on both sides

8x/8 = 64/8

And Voilla

X = 8

Hope this helped! Ask me if you have any further questions!

3 0
2 years ago
The percentage of forest area is determined by dividing the forest area by the total land area of a region.
emmainna [20.7K]

Answer: oh should we not look for it haha you just got burned

Step-by-step explanation:

5 0
2 years ago
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If f(1) = 160 and f(n + 1) = –2f(n), what is f(4)?
balandron [24]

Answer with Step-by-step explanation:

f(1) = 160 and f(n + 1) = –2f(n)

⇒ f(2)= -2×f(1)

        = -2×160

       = -320

⇒ f(3)= -2×f(2)

    = -2×(-320)

   = 640

⇒ f(4)= -2×f(3)

    = -2×640

   = -1280

Hence, Value of f(4) is:

- 1280

7 0
3 years ago
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