All categories

2 years ago

Simplify the following expression 8x+9-6x-7

2 answers:

6 0

1) both 8x and -6x are the same form - they’re just a coefficient with a variable, while 9 and -7 are just plain numbers. move the expression around as shown in the picture: 8x - 6x + 9 - 7. now coefficients with variables are next to each other, while plain numbers are next to each other, making it easier to solve.
2) now solve: 8x - 6x is 2x, and 9 - 7 is 2. now you have 2x + 2, which is the final answer.

i don’t know if i explained it very well, but if you look at the picture you should be fine.

mamaluj [8]2 years ago

4 0

8x + -6x = 2x 2 + 2x

You might be interested in

Hepppppppplppppppplppppppppp

antoniya [11.8K]

Answer:

A = 3 ft, B = 7 ft, C = 4 ft, D = 5 ft, Surface Area = 96 ft^2

Step-by-step explanation:

Step 1: Determine the sides

A → 3 ft

B → 7 ft

C → 4 ft

D → 5 ft

Step 2: Determine the surface area

Area of the sides

$A= 4\ ft * 7\ ft = 28\ ft^2$

$A= 5\ ft * 7\ ft = 35\ ft^2$

$A= 3\ ft * 7\ ft = 21\ ft^2$

Area of the top and bottom triangles

$A= \frac{h\ *\ b}{2} = \frac{3\ ft\ *\ 4\ ft}{2} = \frac{12\ ft^2}{2} = 6\ ft^2 = 2(6\ ft^2) = 12\ ft^2$

Total Area

$28\ ft^2 + 35\ ft^2 + 21\ ft^2 + 12\ ft^2$

$96\ ft^2$

Answer: A = 3 ft, B = 7 ft, C = 4 ft, D = 5 ft, Surface Area = 96 ft^2

5 0

1 year ago

Read 2 more answers

Change 25/6 to mixed fraction

alex41 [277]

Answer:

$4\frac{1}{6}$

Step-by-step explanation:

To find this, first, we need to ask ourselves, "how many times does 6 go into 25?" The answer is 4 because 6 * 4 = 24 with 1 left over. Therefore, we know that the whole number is 4 and the fraction is 1/6, so the answer is $4\frac{1}{6}$ .

5 0

3 years ago

Fill in the table with whole numbers to make 34 in four different ways

Keith_Richards [23]

It would be:

Tens | Ones
3 + 4
2 + 14
1 + 24
0 + 34

Hope this helped! c:

7 0

2 years ago

Read 2 more answers

Find the unknown angle A

uranmaximum [27]

40! When you add all four angles of a quadrilateral together, you will always end up with 360. So, 360-75-120-125=40 :) have a great day!

4 0

3 years ago

Read 2 more answers

Prove that H c G is a normal subgroup if and only if every left coset is a right coset, i.e., aH = Ha for all a e G

Kaylis [27]

$\Rightarrow$

Suppose first that $H\subset G$ is a normal subgroup. Then by definition we must have for all $a\in H$ , $xax^{-1} \in H$ for every $x\in G$ . Let $a\in G$ and choose $(ab)\in aH$ ( $b\in H$ ). By hypothesis we have $aba^{-1} =abbb^{-1}a^{-1}=(ab)b(ab)^{-1} \in H$ , i.e. $aba^{-1}=c$ for some $c\in H$ , thus $ab=ca \in Ha$ . So we have $aH\subset Ha$ . You can prove $Ha\subset aH$ in the same way.

$\Leftarrow$

Suppose $aH=Ha$ for all $a\in G$ . Let $h\in H$ , we have to prove $aha^{-1} \in H$ for every $a\in G$ . So, let $a\in G$ . We have that $ha^{-1} =a^{-1}h'$ for some $h'\in H$ (by the hypothesis). hence we have $aha^{-1}=h' \in H$ . Because $a$ was chosen arbitrarily we have the desired .

5 0

2 years ago