All categories

2 years ago

Please someone help me out here!! I Will Mark the right one Brainiest!!!!but hurry please

Mathematics

1 answer:

mars1129 [50]2 years ago

6 0

Answer:

Step 2

Step-by-step explanation:

During step 2, when dividing by 4 on both sides, Jessica got -16 / 4 was 4, which is not true. Basically she switched the sign when she shouldn't have.

You might be interested in

Find the value of x given in the right triangle

ladessa [460]

Answer:

The formula for this is $c=a^2+b^2$

The value of x would be 7.14 but since it says round to the nearest tenth it would be 7.1 or 7.10

3 0

3 years ago

The sum of the digits of a two-digit number is 5. When the digits are reversed, the number increases by 27. Find the original nu

gavmur [86]

Answer:

Step-by-step explanation:

$a-\text{tens digit}\\b-\text{unity digit}\\10a+b-\text{number}\\10b+a-\text{number with reversed digits}\\a+b-\text{sum of digits}\\\\\bold{System\ of\ equations:}\\\\\left\{\begin{array}{ccc}a+b=5\\10b+a=10a+b+27&\text{subtract}\ 10a\ \text{and}\ b\ \text{from both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}a+b=5\\9b-9a=27&\text{divide both sides by 9}\end{array}\right$

$\underline{+\left\{\begin{array}{ccc}a+b=5\\b-a=3\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad2b=8\qquad\text{divide both sides by 2}\\.\qquad \boxed{b=4}\\\\\text{Put the value of\ b}\ \text{to the first equation}\\\\a+4=5\qquad\text{subtract 4 from both sides}\\\boxed{a=1}$

3 0

3 years ago

8.53*14.2 solve and showing the break down

Solnce55 [7]

Answer: 121.126

<u>Step-by-step explanation:</u>

8.5 3

x <u>1 4.2</u>

1 7 0 6 (2 x 853)

3 4 1 2 0 (40 x 853)

<u>8 5 3 0 0</u> (100 x 853)

12 1 1 2 6

12 1 .1 2 6 (moved the decimal 3 places)

7 0

4 years ago

What is the perimeter of a rectangle with an area of 2x^2+11x+5 in^2?

kirza4 [7]

Answer:

6x + 14

Step-by-step explanation:

Area = side x side

Factor the quadratic:

2x^2 +10x / +1x +5

2x(x+5) 1 (x+5)

(2x + 1) (x+5)

^These are your two sides

Perimeter =2L + 2W

(2(2x+1)) + (2(x+5))

4x+4+2x+10 = final answer 6x + 14

6 0

3 years ago

HELP ! ASAP !!!!!!!!!! 20 POINTSSSS

Alex

B is the answer
I think

7 0

3 years ago

Read 2 more answers