Can someone pls help me with this

Mathematics

1 answer:

nalin [4]2 years ago

5 0

Answer:

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Step-by-step explanation:

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6-^3 ------ 6-^4 A) 6-7 B) 6-1 C) 61 D) 612

Bad White [126]

The answer should be 6 I.e 6^1 as with indices rules you need to subtract the powers (-3-(-4)) which equals 1

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3 years ago

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You're making cookies for a party. 1 of every 20 cookies falls apart. if you make 40 cookies how many will fall apart?

vlabodo [156]

On average, 2 will fall apart. We can tell this by making a proportion.

1/20 = x/40 ---> cross multiply
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40 = 20x ----> divide by 20
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4 0

3 years ago

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7x-2y=16 11x+6y=32.3 how to solve this math problem

Aneli [31]

Answer:

Step-by-step explanation:

These types of equations are called simultaneous equations and the method we can use to solve these type of equations is either Substitution, Elimination and Graphing.

We use substitution here because it is easier.

Equation 1

$7x-2y=16$

Equation 2

$11x+6y=32.3$

Lets take equation 1

$7x-2y=16\\7x=16+2y\\x=\frac{16+2y}{7}$

This is our equation 3 , now put it inside equation 2.

$11x+6y=32.3\\11(\frac{16+2y}{7} )+6y=32.3\\\frac{176+22y}{7} +6y=32.3\\\frac{176+22y+42y}{7}=32.3\\176+22y+42y=226.1 \\\\42y+22y=226.1-176\\64y=50.1\\y=\frac{50.1}{64} \\y=0.783\\$

We found the value of y , now to find the value of x insert the value of y in equation 3

$x=\frac{16+2y}{7}\\x=\frac{16+2(0.783)}{7} \\x=\frac{16+1.566}{7}\\x=\frac{17.566}{7}\\x=2.509$

Solved ! See the attached image on both the straight line graphs i have attached for better understanding. Where both the lines intersect each other is our value of (x , y) respectively.