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4 years ago

1. Find the value of each expression. Show your work.

Mathematics

2 answers:

Mashcka [7]4 years ago

7 0

Are the decimal points supposed to be multiplication symbols?

kolezko [41]4 years ago

4 0

Answer: A) 1.44 B) 13 C) 3

Step-by-step explanation:

A) 1.2 * 1.2 =1.44

B) (8) +17 - (12)= (8+17) -12= (25)- (12)= 13

C) (9*9) / (3*3*3)= (81) / (27)= 3

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20 cm 16 cm 10 cm 12 cm What is the surface area of the triangular prism?

andriy [413]

Answer:

710.48

Step-by-step explanation:

5 0

3 years ago

Mr. Smith's class has 28 students. They all put in an equal amount of money to get Mr. Smith an end of year gift. If they collec

ivann1987 [24]

Answer:

Step-by-step explanation:

28 students all give $128

so,

$\sqrt[28]{128}$ = v v=6

Each student gave 6 dollars. This is true due to the fact that

$\sqrt[28]{128}$ =6

28X6=128

3 0

3 years ago

You have solved a system of equations by substitution and got one solution. How were you able to determine it was one solution?

sergeinik [125]

Answer: the variable can not be replaced by any other number

Step-by-step explanation:

7 0

3 years ago

(4ab - 8a 2 + 12ac) ÷ 4a

ioda

we are given

$\frac{(4ab-8a^2+12ac)}{4a}$

we can see that

4a is in multiple in numerator

so, we can factor it out

$\frac{4a(b-2a+3c)}{4a}$

now, we can cancel 4a

and we get

$(b-2a+3c)$ .............Answer

7 0

4 years ago

Solve the simultaneous equations 2x+y=5 5x+3y=12

Bezzdna [24]

Answer:

x=3 and y= -1

Step-by-step explanation:

Step 1: Solve2x+y=5 for y:

2x+y=5

2x+y+−2x=5+−2x(Add -2x to both sides)

y=−2x+5

Step 2: Substitute−2x+5foryin5x+3y=12:

5x+3y=12

5x+3(−2x+5)=12

−x+15=12(Simplify both sides of the equation)

−x+15+−15=12+−15(Add -15 to both sides)

(Divide both sides by -1)

x=3

Step 3: Substitute3forxiny=−2x+5:

y=−2x+5

y=(−2)(3)+5

y=−1(Simplify both sides of the equation)

Answer:

x=3 and y=−1

5 0

3 years ago