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attashe74 [19]
3 years ago
11

I need help plz with this

Mathematics
1 answer:
madam [21]3 years ago
5 0

Answer:

a) 390

b)108

I hope this answer was helpfull for you

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here are five rods a-1 a a a a+3 all measurements are in cm the total length of the five rods is l cm find a formula for l in te
Elenna [48]

Answer:

I=5a+2 (simplified form)


Step-by-step explanation:

I is the total length of all the 5 rods.

Each of the 5 parts lengths are (a-1), a, a, a, (a+3), respectively.


<em>We add all of them and equate it to I:</em>

I=(a-1)+a+a+a+(a+3)

<em>Simplifying this, we take like terms and add:</em>

<em>I=(a-1)+a+a+a+(a+3)\\I=5a-1+3\\I=5a+2</em>


5 0
3 years ago
An equality that represents numbers that are not a solution of x-1.2&gt;2.8
ValentinkaMS [17]

The solution is x> 4 or x ∈(4,∞)

Here equality given is

x - 1.2> 2.8

Rearrange the variable to the left side of the equation

x > 2.8 + 1.2

Calculate the sum

x > 4

Or we can also say

x ∈ (4,∞)

Therefore the range of x is x∈ (4,∞).

To know more about the range of the solution refer to the link given below:

brainly.com/question/2264373

#SPJ1

4 0
7 months ago
A rectangle has an area of 8 square centimmetres and a perimeter of 12 cm. What are the width and breath?
vlada-n [284]
Let the Length be L and the Width be W

The area is 8 cm²
LW = 8

The perimeter is 12
2(L + W) = 12
L + W = 6

Solve L and W:
LW = 8 --------------- (1)
L + W = 6------------ (2)

Equation (2):
L + W = 6
L = 6 - W -------------- Sub into (1)
(6 - W) W = 8
6W - W² = 8
W² - 6W + 8 =0 
(W -2 )(W - 4) = 0
W = 2 or 4

When W =2, L = 6 - 2 = 4
When W = 4, L = 6 - 4 = 2

Answer: The Width is 2 cm and the Length is 4 cm
8 0
2 years ago
Bonjour pouvez vous m'aider pour les exercices 81 à 85 je suis en 6ème. Merci de m'aider.
spin [16.1K]
Je vous aiderais... mais y a-t-il une question pour elle ?
6 0
2 years ago
Solve the equation 7 1/4 = 2 4/5 + m<br> m=
Nuetrik [128]
M=4.45 subtract 7 1/4 and 2 4/5 and you should get 4.45 and that is m
4 0
3 years ago
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