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professor190 [17]
3 years ago
10

Factorise fully 21x² +25x =4​

Mathematics
1 answer:
Vitek1552 [10]3 years ago
6 0
X= 1/7, -4/3
________
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a machine packs boxes at a constant rate of 2/3 of a box every 1/2 minute. what is the number of boxes per minute that the machi
Kruka [31]
I think it's 2/3 x 2 = <em>4/6</em>
8 0
3 years ago
The combined area of two squares is 45 square centimeters.each side of one square is twice as long as the side of the other .wha
serg [7]
Formula of square area
a = s²
thus, area of the first square could be written as s₁² and area of the second square could be written as s₂²

First, write an expression in the form of equation system
An expression for "The combined area of two squares is 45 square centimeters" is:
⇒ s₁² + s₂² = 45 <em>(first equation)</em>
An expression for "Each side of one square is twice as long as side of the other" is:
⇒ s₁ = 2s₂ <em>(second equation)</em>

Second, solve the equation system by substitution method.
⇒ We could substitute 2s₂ to s₁ (second equation) in the first equation in order to find the value of s₂
s₁² + s₂² = 45
(2s₂)² + s₂² = 45
(2²)(s₂)² + s₂² = 45
4s₂² + s₂² = 45
5s₂² = 45
s₂² = 45/5
s₂² = 9
s₂² = 3²
s₂ = 3

⇒ Substitute the value of s₂ to the second equation in order to find the value of s₁
s₁ = 2s₂
s₁ = 2(3)
s₁ = 6

The length of each side of the larger square is 6 centimeters
3 0
4 years ago
The sum of the interior angles of a 7-gon is
Liono4ka [1.6K]
1260 is the answer for this question i believe
4 0
4 years ago
Read 2 more answers
What value is equivalent to 3^2 · 4^3?
pogonyaev

Answer:

576

Step-by-step explanation:

3*2 = 9

4*3 = 64

9 x 64 = 576

3 0
2 years ago
Complete the square to re-write the quadratic function in vertex form:<br> y = x2 + 72 +6
vekshin1

Answer:

I love algebra anyways

The ans is in the picture with the  steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Step-by-step explanation:

3 0
3 years ago
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