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Usimov [2.4K]
3 years ago
13

Evaluate the expression 3.14(a^2 + ab) when a = 3 and b = 4

Mathematics
2 answers:
otez555 [7]3 years ago
7 0

Answer:

ASK YOUR QUESTION

Middle School  Mathematics  5+3 pts

Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4. (Input decimals only, such as 12.71, as the answer.)

Report 13.07.2017

Answer

3.14(a^2 + ab) when a = 3 and b = 4

then

3.14(3^2 + 3*4)

= 3.14(9+12)

= 3.14(21)

= 65.94

15

Step-by-step explanation:

masya89 [10]3 years ago
5 0

Answer:

the answer is 21 <em>pi.</em>

Step-by-step explanation:

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One peach weigh 5 ounces. bella buys 8 peaches. what is the total weight of the peach​
Oliga [24]

Answer:

40 ounces

Step-by-step explanation:

well if every peach weighs 5 ounces and she buys 8, just do 8 x 5 and you get 40

4 0
3 years ago
the perimeter of a scalene triangle is 14.5 cm. the longest side is twice that of the shortest side. which equation can be used
madreJ [45]
Let a = longest side      <em> (Establishing labels)</em>
let b = shortest side
let c = third side

P = 14.5                <em>     (Given)</em>
a = 6.2
b = 1/2(a)

P = a + b + c
P = 6.2 + 3.1 + c        <em>(Fill in given info in equation)</em>

P = 9.3 + c                <em>(Simplify)</em>

14.5 = 9.3 + c           <em>(Simplify)</em>

c = 14.5 - 9.3           <em>(Solve)</em>
c = 5.2

Hope this made sense!
5 0
3 years ago
Read 2 more answers
Lisa's dog has 4 squeaky toys. Two thirds of the dog's toys are squeaky toys. How many dog toys does Lisa's have in all?
viva [34]
.  Lisa's dog has 4 squeaky toys   
.  the squeaky toys are 2/3 of all the dog's toys

.  let <em>x</em> be number of all dog toys

<em>make an equation</em>
(2/3)<em>x</em> = 4   <em>← solve</em>
x=6

<em>check</em>
2/3 × 6 = 4

<u>Lisa's Dog has 6 toys in all</u>



3 0
3 years ago
Solve for x. −1/2x+1/3&gt;3/5
Brilliant_brown [7]
X 307/ty;sm thats is mathematical thingy
8 0
3 years ago
Read 2 more answers
Help me pls<br> this is very important
inysia [295]

Answer:

C/3rd one. (y=2x+4)

Step-by-step explanation:

In the equation y=mx+b, m=slope of the line and b=y-intercept. From the graph, we know the y-intercept is 4 so we can write y=mx+4. To find the slope: (0-4)/(-2-0) = (-4)/(-2) = 2. We can replace the m with 2 to get the final equation of y=2x+4 which is also the third answer.

7 0
3 years ago
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