MATHEMATICS MIDDLE SCHOOL

The sum of Sally's age plus twice Tomas's age is 12. The difference of Sally's age and Thomas's age is 3. Write and solve a system of equation to find their ages. Interpret the solution.

Answers

Answer 1
Answer: s=sally
tomas=t

s+2t=12
s-t=3
add t to both sides
s=3+t
subtitute 3+t for s in first equation
3+t+2t=12
3+3t=12
subtract 3
3t=9
divide by 3
t=3
tomas=3

subsitute
s=t+3
s=3+3
s=6

sally=6
tomas=3
Answer 2
Answer: Sally is older because:Sally:6Thomas:3Twice Thomas's age is 6.6+6=12Equation:6+3x2 or (6+3)x2 hint:PEMDASSolved:12

Related Questions

Which of the trinomials below has 3x^2the GCF of its terms?A. 936 – 18x4 + 27x3B. 3x4 + 9x2 - 6x?C. 9x4 + 12x2 - 6xD. 3x3 + 9x4 - 6x?
What is -2 times -3?
Which of the following choices is closest to the distance (in miles) between points A and B?3.16 miles3.46 miles4.47 miles4.90 miles
The height ,H of a cylinder is 5 units less than 3 times the radius, r. What is an expression that can represent this
What is the y-intercept of a line that has a slope of 1/4 and passes through point (8,3)?

Melanie and Brad each drink 10 cups of water every day. How many gallons of water do the three of them drink altogether each week?

Answers

I want to tell a week is 7 days and you multiply 10 and 7. It's 70. You swap the numbers and it becomes 07. You just put a decimal point between the numbers so it's 0.7.

ALGEBRA HELP PLEASE?!A group of art students are painting a mural on a wall. The rectangular wall has deminsions of (6x+7) by (8x + 5) and are planning on the mural to be (x+4) by (2x+5). What is the area of the remaining wall after the mural has been painted?
A: 46x^2 + 73x + 15
B: 48x^2 + 86x +35
C: 2x^2 + 13 + 20
D: 50x^2 + 99x + 55

Answers

i think A is the answer .

K-ーーーーーー-8 cm一ーーーーーH
:孙
Cm
그 :cm
T
勺

Answers

Answer:

c

Step-by-step explanation:

The variables A, B, and C represent polynomials where A = x2, B = 3x + 2, and C = x – 3. What is AB – C2 in simplest form?

Answers

Answer:

AB-C^2 in simplest form:

3x^3+x^2+6x-9

Step-by-step explanation:

The distributive property says that:

a \cdot (b+c) =a\cdot b+ a\cdot c

Given that:

The variables A, B, and C represent polynomials

Where,

A = x^2

B = 3x+2

C = x-3

We have to find the AB-C^2

then;

AB-C^2 =(x^2)(3x+2)-(x-3)^2

Apply the distributive property :

(3x^3+2x^2)-(x-3)^2

⇒3x^3+2x^2-(x^2+9-6x)

Remove the bracket, we have;

3x^3+2x^2-x^2-9+6x

Combine like terms;

3x^3+x^2+6x-9

Therefore, AB-C^2 in simplest form: 3x^3+x^2+6x-9
AB - C2 = (x2)(3x + 2) - (x-3)2
AB - C2 = 3x3 + 2x2 - (x2 -6x +9)
AB - C2 = = 3x3 + 2x2 - x2 + 6x - 9
AB - C2 = = 3x3 + x2 + 6x - 9

Does 14.2857143 round to a whole number

Answers

Answer:

Yes it can be rounded to the nearest whole Number 14

Step-by-step explanation:

Which of the following is most likely the next step in the series?

Answers

The answer is D (i think lol) <3
The next step in the series is A
Other Questions
Add 26.2 + 0.07 + 21.A 29.0 B 47.27 C 26.48D 54.2
I have 7th grade common core test coming up tomorrow and I have fallen so far behind. Can someone give me some (hopefully many) tips for it?
What shape is a quadrilateral?
HOMEWORK HELP NEED IT FAST PLEASE!1. Write the next two terms in the pattern 12,48,192,768 ___,___, 2. which of the following rules apply to the pattern shown below 8,16,24,32 3. Find the missing term 75,67,59,___,43,45 4. The rule for a pattern is given below start with 96 and divide by 2 repeatedly which two numbers would not be in a term for this pattern 32 24 16 3