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Hatshy [7]
3 years ago
13

Clare bought a photo for 17 cents and paid with a $5 bill.

Mathematics
1 answer:
KATRIN_1 [288]3 years ago
4 0

Answer:

hundredths place

Step-by-step explanation:

because after the decimal it starts in tenth place and you want enough room to make it -0.17

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Which of the following is an equivalent trig ratio for sin 60.
Liono4ka [1.6K]

Answer:

it sin 60

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Solve the quadratic equation by completing the square. x2 + 6x + 7 = 0
ruslelena [56]
Hello,

x²+2*3x+3²+7-9=0
==>(x+3)²-2=0
==>(x+3-√2)(x+3+√2)=0
==> x=-3+√2 or x=-3-√2
7 0
2 years ago
Anyone can help me solve this equation using cross multiplying
Natali5045456 [20]

9514 1404 393

Answer:

  x = 1 or 5

Step-by-step explanation:

The notion of "cross-multiplying" is the idea that the numerator on the left is multiplied by the denominator on the right, and the numerator on the right is multiplied by the denominator on the left. This looks like ...

  \displaystyle \frac{x-1}{7}=\frac{2x-2}{3x-1}\ \longrightarrow\ (x-1)(3x-1)=(7)(2x-2)

Then the solution proceeds by eliminating parentheses, and solving the resulting quadratic equation.

  3x^2-4x+1=14x-14\\\\3x^2-18x+15=0\qquad\text{subtract $14x-14$}\\\\x^2-6x+5=0 \qquad\text{divide by 3}\\\\(x-1)(x-5)=0\qquad\text{factor}\\\\x\in\{1,5\}

_____

<em>Comment on "cross multiply"</em>

Like a lot of instructions in Algebra courses, the idea of "cross multiply" describes <em>what the result looks like</em>. It doesn't adequately describe how you get there. The <em>one and only rule</em> in solving Algebra problems is "<em>whatever is done to one side of the equation must also be done to the other side of the equation</em>." If you multiply one side by one thing and the other side by a different thing, you are violating this rule.

What looks like "cross multiply" is really "<em>multiply by the product of the denominators</em> and cancel like terms from numerator and denominator." Here's what that looks like with the intermediate steps added.

  \displaystyle \frac{x-1}{7}=\frac{2x-2}{3x-1}\\\\\frac{x-1}{7}\times7(3x-1)=\frac{2x-2}{3x-1}\times7(3x-1)\\\\(x-1)(3x-1)=(2x-2)(7)\qquad\textit{looks like}\text{ cross multiply}

8 0
2 years ago
John invested 400 in a savings account how much interest will he earn in 5 years if the interest rate is 7 percent
Aleksandr-060686 [28]
400(1.07)=428
28(5)=140
140+400= 540. 
$540 is your answer
4 0
2 years ago
HEEELP ASAP I WILL AWARD BRAINKIEST AND THANKS
KATRIN_1 [288]

Answer:

The 4th option is the correct answer

Step-by-step explanation:

Hope this helps:)

4 0
2 years ago
Read 2 more answers
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