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3 years ago

My allowance has increased $13 a week and is now $42. What was my old allowance?

Mathematics

2 answers:

faust18 [17]3 years ago

7 0

Your allowance was $29

inn [45]3 years ago

7 0

Answer:

Step-by-step explanation:

42-13=29

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Can someone please help

Flura [38]

Answer:

b 120 cm

Step-by-step explanation:

6 0

3 years ago

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The table shows a company’s profit based on the number of pounds of food produced.

Bingel [31]

Answer:

$5,300

Step-by-step explanation:

Formulae used,

$a=\dfrac{(\sum x^2y\sum xx)-(\sum xy\sum xx^2)}{(\sum xx\sum x^2x^2)-({\sum xx^2)}^2}$

$b=\dfrac{(\sum xy\sum x^2x^2)-(\sum x^2y\sum xx^2)}{(\sum xx\sum x^2x^2)-({\sum xx^2)}^2}$

$c=\dfrac{\sum y}{n}-b\frac{\sum x}{n}-a\frac{\sum x^2}{n}$

Where,

$\sum xx=\sum x^2-\dfrac{(\sum x)^2}{n}$

$\sum xy=\sum xy-\dfrac{\sum x\sum y}{n}$

$\sum xx^2=\sum x^3-\dfrac{\sum x\sum x^2}{n}$

$\sum x^2y=\sum x^2y-\dfrac{\sum x^2\sum y}{n}$

$\sum x^2x^2=\sum x^4-\dfrac{(\sum x^2)^2}{n}$

Putting the values from the table, we get the best fit line as,

$y= -0.0817x^2 + 102.24x - 20421$

As we want to calculate the profit at 350 pounds, so putting x=350, we get

$y= -0.0817(350)^2 + 102.24(350) - 20421=\$5354.75$

5 0

3 years ago

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Can someone please help with this maths !!!!!

ioda

Answer:

C) -3

Step-by-step explanation:

Rearrange your equation so that it is in slope-intercept form (y = mx + b). The m in the equation is the gradient.

y = 7 - 3x

y = -3x + 7

The m-value is -3. This means that the gradient is -3.

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3 years ago

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Help solve -4 + n/2 = -12

Nat2105 [25]

Answer:

n=-16

Step-by-step explanation:

Add 4 on each side:

n/2 = -12+4

n/2 = -8

Multiply 2 on each side:

n=-16

6 0

2 years ago

A 29 ft long rope is tied to the top of a flag pole. The rope is staked to the ground 21 ft away from the base of the pole. How

german

Answer: option A is the correct answer.

Step-by-step explanation:

The rope, the flagpole and the ground would form a right angle triangle. The length of the rope represents the hypotenuse of the right angle triangle. The vertical height of the flagpole represents the opposite side of the right angle triangle. The distance from the point where the rope is staked to the ground to the base of the pole represents the adjacent side of the right angle triangle.

To determine the height if the flagpole h, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

Therefore,

29² = 21² + h²

841 = 441 + h²

h² = 841 - 441 = 400

h = √400 = 20 ft

4 0

2 years ago