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mr Goodwill [35]
3 years ago
9

John has $80. Every week, he spends $7.

Mathematics
1 answer:
Minchanka [31]3 years ago
7 0

Answer:

80 - 14

Step-by-step explanation:

if John spends seven dollars a week, then in 2 weeks he spends $14. 7x2= 14

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Four people each invested $450 in an account that earns simple interest assuming no other deposit or withdrawal were made witch
lina2011 [118]

Answer: $250

Step-by-step explanation: Step 1: Multiply $50 by 4 Step 2: Subtract $450 by $250 Step 3: Then you get $200 leftover

8 0
3 years ago
Simplification<br> (a-b)²=a²+2ab-b²
lesya [120]
<h2> ANSWER:</h2>

<em>I wonder if you have your equation wrong, because(a−b)2=(a−b)(a−b)=a2−ab−ba+b2=a2–2ab+b2</em>

<em> </em>

<em> Your equation, on the other hand, is (a+b)2 and that is not equal to (a−b)2 except when ab=0, i.e. when either a or b equals 0, and that is not what we normally mean by “prove”. Prove would imply “for all values of a and b”, which is not the case in the form you have your equation,</em>

<em><u>hope </u></em><em><u>you </u></em><em><u>undestood</u></em><em><u> </u></em><em><u>what </u></em><em><u>i </u></em><em><u>meant.</u></em><em><u>. </u></em>

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5 0
3 years ago
Identify the vertex and the axis of symmetry for y=-(x+3)^2+1
Alex
<u>Vertex</u>
y = -(x + 3)² + 1
y = -(x + 3)(x + 3) + 1
y = -(x² + 3x + 3x + 9) + 1
y = -(x² + 6x + 9) + 1
y = -x² - 6x - 9 + 1
y = -x² - 6x - 8
-x² - 6x - 8 = 0
x = <u>-(-6) +/- √((-6)² - 4(-1)(-8))</u>
                      2(-1)
x = <u>6 +/- √(36 - 32)</u>
                -2
x = <u>6 +/- √(4)
</u>           -2<u>
</u>x = <u>6 +/- 2
</u>          -2
x = <u>6 + 2</u>       x = <u>6 - 2</u>
        -2                  -2
x = <u>8</u>             x = <u>4</u>
     -2                 -2
x = -4            x = -2
y = -x² - 6x - 8
y = -(-4)² - 6(-4) - 8
y = -(16) + 24 - 8
y = -16 + 24 - 8
y = 8 - 8
y = 0
(x, y) = (-4, 0)
or
y = -x² - 6x - 8
y = -(-2)² - 6(-2) - 8
y = -(4) + 12 - 8
y = -4 + 12 - 8
y = 8 - 8
y = 0
(x, y) = (-2, 0)

<u>Axis of Symmetry</u>
The axis of symmetry is equal to -3.
<u />
4 0
4 years ago
Carina spent a total of $5.27 buying a pineapple for $3.40 and some tomatoes that were on sale for $0.85 per pound. To determine
Neporo4naja [7]

Answer:

She subtracted 3.4 on the left and added 3.40 on the right

Step-by-step explanation:

3.40 + 0.85 x = 5.27

Subtract 3.40 from each side  

3.40 -3.40+ 0.85 x = 5.27-3.40

.85x = 5.27 - 3.40

.85x =1.87

Divide by .85

.85x/.85 =1.87/.85

x = 2.2

7 0
3 years ago
Read 2 more answers
The volume of this rectangular prism is 72 in³. What is the missing measurement for c?
chubhunter [2.5K]

Answer:

6

Step-by-step explanation:

The formula for finding the volume of a rectangular prism is lwh so u multiply 3 and 4 which is 12 and divide 72 by 12.

8 0
2 years ago
Read 2 more answers
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