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liq [111]
2 years ago
12

Evaluate 3x2 - 4 when χ= 2. Α. 2 Ο Ο Ο Ο Β. 8 C. 12 Ο D. 32

Mathematics
1 answer:
solniwko [45]2 years ago
3 0

Answer:

D. 32.

Step-by-step explanation:

3x^2 - 4\\= 3^2 * 2\\= 6^2 - 4\\= 36 - 4\\= 32.

hope this helps.

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how to solve this prroblem by marianne buys 16 bags of potting soil that come in 5÷8_pound bags .how many pounds of potting soil
barxatty [35]
So, she buys 16 bags, each of them weights\frac{5}{8} pounds.

to find how many pounds of soil she bought, we have to multiply:

16*\frac{5}{8}=//16 is equal to 8*2, so we can simpify:
2*\frac{5}{1}

which is 2*5=10

so in the end she bought 10 pounds of soil!

3 0
3 years ago
Write an expression that represents the value in cents of n nickels
erma4kov [3.2K]
An expression does not have an equal sign.
Since the value of a nickel is 5 cents and you want to find out the value of n nickels (which means if you had any number of nickels) the expression would be
.05n
8 0
3 years ago
Read 2 more answers
There are 178 more bikers than hikers if there are 676 people in the park total how many people are hikers?
Verizon [17]

Answer:

The total number of hikers are 427

Step-by-step explanation:

Let:

The number of bikers = x

The number of hikers = y

There are 178 more bikers than hikers

y = x + 178

if there are 676 people in the park total how many people are hikers?

Hence:

x + y = 676

we substitute x + 178 for y

x + x + 178 = 676

2x + 178 = 676

2x = 676 - 178

2x = 498

x = 498/2

x = 249

y =x + 178

y = 249 + 178

y = 427

Therefore:

The number of bikers = x = 249

The number of hikers = y = 427

The total number of hikers are 427

3 0
2 years ago
A car rental company charges a one-time application fee of 40 dollars, 55 dollars per day, and 13 cents per mile for its cars. A
liberstina [14]

Answer:

A) C(d,m) = 40 + 55d + 0.13m

B) $448

Step-by-step explanation:

Let 'd' be the number of days and 'm' the number of miles driven.

A) The cost function that describes a fixed amount of $40, added to a variable amount of $55 per day (55d) and a variable amount of 13 cents per mile (0.13m) is:

C(d,m) = 40 +55d +0.13m

B) If  d = 5 and m =600, the total cost is:

C(5,600) = 40 +55*6 +0.13*600\\C(5,600)=\$448

The cost is $448.

3 0
3 years ago
Read 2 more answers
The the length of a rectangle is 9 centimeters less than four timesfour times its width. its area is 28 square centimeters. find
wel

Let w = width

then

5w-3 = length

w(5w-3) = 14

5w^2-3w = 14

5w^2-3w-14=0

(5w+7)(w-2) = 0

w = {-7/5, 2}

throw out the negative solution leaving

w = 2 centimeters

length:

5w-3 =5(2)-3 =10-3 = 7 centimeters

4 0
3 years ago
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