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Rom4ik [11]
3 years ago
13

What's -3a(5a-7) ? I can't figure It out .

Mathematics
2 answers:
DochEvi [55]3 years ago
6 0
I think maybe -15 but I’m not sure
steposvetlana [31]3 years ago
3 0
It is - 15 a ^ 2 + 21 a.
You use distributive property
You might be interested in
What is the value of x angel in a pentagon if each interior angel is 117 , 100 , 105 and 115
RUDIKE [14]

Answer:

Step-by-step explanation:

Well first you have to find what the total amount of all the interior angles. In Oder to do that you count how many sides the shape has the subtract two from that number. Take the number you get from that and multiply it by 180. That number is total amount of all the interior angles including the angle x. Take the angles you do know and add them together. Take the number you get from that and subtract it from the total amount of all interior angles. The number you get from that is your answer. The answer to this problem is 103.

3 0
3 years ago
Please help a picture of the problem is attached plz no trolls
Dmitry [639]
3r+1w=5
5r+1w=80

System of equations :)
3 0
2 years ago
$5 box of cereal; 40% discount. any kind of ceral.
vovangra [49]

Answer:

3

Step-by-step explanation:

4 0
3 years ago
If m = 3 and b = 6, what is the correct equation for Line of Best Fit?
Alchen [17]

Answer:

B

Step-by-step explanation:

The equation is Y = mx + b so just plug in the m and the b

6 0
3 years ago
Read 2 more answers
PLZ I NEED HELP NOW THANKS
xeze [42]

Answer:

1240.4 mm²

Step-by-step explanation:

SA of Pentagonal pyramid:

(as)(5/2) + (sl)(5/2)

↑ ↑

base area lateral area

_____________________

a: apothem (in-radius) length, s: side length.

l: slant height.

______________________

Since we are already given the base area which is 440.4 mm². All we need to do is find the lateral area and add both areas together.

Given that the triangular face of the lateral part has a side/base length of 16mm, and a 20mm slant height.

A triangle has an area of ½bh and since there are 5 of these faces total, (5)(½bh) = (5/2)(bh). In a three dimensional perspective, b will be s and h will be l so (sl)(5/2).

With this information the surface area is:

(16)(20)(5/2)mm + (440.4 mm²) →

800 mm² + 440.4 mm² =

1240.4 mm²

7 0
3 years ago
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