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antiseptic1488 [7]
3 years ago
8

Help!

Mathematics
2 answers:
Ostrovityanka [42]3 years ago
8 0

Answer:

a

Step-by-step explanation: I looked it up

saw5 [17]3 years ago
3 0

Answer:

( a )   The system of equations:

2 r + b = 8.40

3 r + b = 9.35

( c )  Each item costs:

b = $6.50,  r = $0.95

Step-by-step explanation:

Is it right? Tell me if it isn't.

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For which value of b can the expression x2 + bx + 18 be factored?
WINSTONCH [101]

An expression is defined as a set of numbers, variables, and mathematical operations. The value of b for which the expression x² + bx + 18 can be factored is 9.

<h3>What is an Expression?</h3>

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The value of b for which the given expression x² + bx + 18 can be factored is 9. This will make the expression factored as (x+3) and (x+6).

Thus, the value of b for which the expression x² + bx + 18 can be factored is 9.

Learn more about Expression:

brainly.com/question/13947055

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6 0
2 years ago
A well of diameter 4m is dug 14m deep. The earth taken out is spread evenly all around the well to form a 40cm high embankment.
dimulka [17.4K]

Answer:

82.72m

Step-by-step explanation:

Volume = πr2h

= 3.142*7*7*14

= 2,155.41m³

Now that we hav the volume of earth, we go on to find the raduis of the spread

2155.41m³ = 3.142*r²*0.4

2155.41m³ = 1.26r²

r² = 1,710.64

r = 41.36m

Width = diameter = 2r = 82.72m

8 0
3 years ago
Which expression shows twice the sum of 8 and a number n?
IRISSAK [1]
Correct Answer: A. 2(n+8).
6 0
3 years ago
What does y equal when the equation 4y-1=7
asambeis [7]
4y - 1 = 7    / + 1 ;
4y = 8         /÷4 ;
y = 2 ;
7 0
3 years ago
Solve x square − 10 x + 35 by completing the square.
Doss [256]

Answer: X=0.28571428571

Step-by-step explanation:

-10x divide by 10 =x , -10 divide by 35=0.28571428571

7 0
3 years ago
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