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3 years ago

Plz help with science!

Mathematics

1 answer:

inna [77]3 years ago

4 0

For number thirteen I believe it is Alkali metals,and btw this should be in science not math.

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Evaluate when a = 8 and b = -4 a(a - b) ÷ (a + b) A) -12 B) 8/3 C) 10 D) 24 what the answer

puteri [66]

Answer:

Step-by-step explanation:

a = 8 and b = -4 a(a - b) ÷ (a + b)

A) -12

B) 8/3

C) 10

D) 24

ANSWER IS D) 24

7 0

3 years ago

Mathematics <br><br> Solving inequality

lions [1.4K]

Answer:

x _> 9 I dont have the symbol on my phone so I just put the greater than sign there

Step-by-step explanation:

1. Subtract 3 from both sides

5x > 48 - 3

2. simplofy 48 - 3 to 45

5x > 45

3. Divide both sides by 5

x > 45/5

4. Then simplify 45/5 to 9 which gives us the answer

And again I dont have the sign thats why I used the greater than sign

3 0

3 years ago

Can you guys help me please.

ziro4ka [17]

Answer: 4

Step-by-step explanation:

Hope this helps

4 0

3 years ago

Read 2 more answers

N-5÷2=5 help ASAP PLEASE!!!!!

Alinara [238K]

Answer:

7.5 or 15/2 (Whatever form you need to use)

Step-by-step explanation:

N-5 divided by 2 =5

Combine like terms:

-5 divided by 2= -2.5.

N-2.5=5

Add -2.5 from itself, then do the same to the other side:

N-2.5=5

+2.5=+2.5 (Adding 2.5 to -2.5 cancels it out)

N=7.5

6 0

3 years ago

What properties can be used to solve 7y-15=-29. Identity property of multiplication,addition property of equality ,distributive

Sveta_85 [38]

Answer:

Addition Property of Equality.

Inverse property of multiplication.

Step-by-step explanation:

Given the equation:

$7y-15=-29$

First of all, let us use Addition Property of Equality.

According to the property, if we add a number on both sides of an equality, there is no change in the equality.

In other words, the equality will be same if we add the same number on Left Hand Side and Right Hand Side of the equality.

First of all, let us add 15 on both sides of the equality:

$7y-15+15=-29+15\\\Rightarrow 7y=-14$

Now, let us Inverse property of multiplication.

i.e. Multiplication of a number with its inverse is equal to 1.

$a\times \frac{1}{a} = 1$

So, let us multiply the given equation with $\frac{1}7$

$7y \times \dfrac{1}{7}=-14 \times \dfrac{1}{7}\\\Rightarrow 1y =-2\\\Rightarrow y=-2$

The properties used are:

Addition Property of Equality.

Inverse property of multiplication.

7 0

3 years ago