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ser-zykov [4K]
3 years ago
5

Write an algebraic expression for the word phrase 9 less than half a number

Mathematics
1 answer:
Digiron [165]3 years ago
5 0
1/2x -9, you take half of x so multiply 1/2 times x then you subtract the 9 after due to PEMDAS ( parentheses, exponents, multiplication & division, Add & Subtract) you follow the order of operation starting with Parentheses and ending with adding or subtracting
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Write an equation that you can use to find the value of x.
MariettaO [177]
Line CA is a straight line, meaning it adds up to 180°

Line BE splits the line into two supplementary angles, because when the two angles are added together they will equal 180°

Using the rule of supplementary angles, we can then make the equation 3x + 8x + 15 = 180

Now, simplify the equation by combining like terms

11x + 15 = 180

To solve, isolate x

11x + 15 = 180
11x = 165
x = 15
7 0
2 years ago
If using the method of completing the square to solve the quadratic equation x2 + 3x - 17 = 0, which number would have to be add
MatroZZZ [7]

Answer:

Step-by-step explanation:

To solve using completing square, we need to write the equation as x2+3x=17.

The next step is to add a number such that the square can be completed. The number must be equal to (b/2a)^2, so here it will be (3/2)^2 = 9/4

The equation then becomes x2+3x+(9/4)=17+(9/4).

Solving it further will get you the final answer

8 0
2 years ago
Sally went to the clearance rack at a department store and found a shirt she wanted to buy. The shirt was $36.00 and is on sale
jeka57 [31]

Answer:

33.34%.

Step-by-step explanation:

Given that,

The actual price of the shirt = $36

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We need to find the percent of the decrease. The formula for the percentage is given by :

\%=\dfrac{|\text{actual value-estimated value}|}{\text{actual value}}\times 100

Putting all the values,

\%=\dfrac{24-36}{36}\times 100\\\\=33.34\%

So, the percentage decrease in the price of the shirt is 33.34%.

6 0
3 years ago
4-Fui al supermercado y había un descuento del 15% en el total de la compra, si pagaba en efectivo. Gasté $ 2.400. ¿Qué cantidad
Grace [21]

Answer:

$2.040

Step-by-step explanation:

Para calcular la cantidad que fue abonada en realidad, debes encontrar el valor del descuento calculando el 15% del valor total de la compra y este resultado se debe restar del total:

$2.400*15%= $360

$2.400-$360= $2.040

De acuerdo a esto, la cantidad abonada en realidad es: $2.040.

6 0
3 years ago
Help please i need this asap !!
Nookie1986 [14]

Answer:

slope is about 1.67

Step-by-step explanation:

2/1.2 ≈ 1.67

hope this helps :)

5 0
3 years ago
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