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2 years ago

Split 54 between 4 people

Mathematics

1 answer:

matrenka [14]2 years ago

8 0

Answer:

your answer is 13.2

Step-by-step explanation:

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Simplify completely x^2+7x-30/x+10

marta [7]

Answer:

(x-3)

Step-by-step explanation:

we have

$\frac{x^{2}+7x-30}{x+10}$

step 1

Simplify the numerator

Complete the square

Equate the equation to zero

$x^{2}+7x-30=0$

$x^{2}+7x=30$

$x^{2}+7x+3.5^{2}=30+3.5^{2}$

$x^{2}+7x+12.25=42.25$

Rewrite as perfect squares

$(x+3.5)^{2}=42.25$

Take square root both sides

$(x+3.5)=(+/-)6.5$

$x=-3.5(+/-)6.5$

$x=-3.5(+)6.5=3$

$x=-3.5(-)6.5=-10$

therefore

$x^{2}+7x-30=(x-3)(x+10)$

substitute in the numerator

$\frac{x^{2}+7x-30}{x+10}=\frac{(x-3)(x+10)}{x+10}=x-3$

8 0

4 years ago

Shown below is a problem Margaret solved and the steps she used to solve it. Margaret has entered this problem incorrectly. What

leva [86]

She has distributed the bracket incorrectly

$\frac{1}{2}$ (64 + 5) - 0.2(- 20 + 10)

= $\frac{1}{2}$ (69) - 0.2 (- 10)

=34.5 + 2

= 36.5

7 0

4 years ago

Sienna used base-ten blocks to find 45 divide 3

Mice21 [21]

Answer would most likely be quince

7 0

4 years ago

A. The slope is 55, representing the trip fee.

Morgarella [4.7K]

Answer:

c. the slope is 70, representing the old cost

4 0

3 years ago

What is the equation of a circle whose center is begin ordered pair negative 4 comma 6 end ordered pair and whose radius is 9 cm

solong [7]

Answer:

$(x+4)^2+(y-6)^2=81$

Step-by-step explanation:

We want to find equation of a circle with center (-4,6) and radius 9cm.

The equation of a circle with center (h,k) and radius $r$ units is given by;

$(x-h)^2+(y-k)^2=r^2$

We substitute the radius and the center to obtain;

$(x+4)^2+(y-6)^2=9^2$

The required equation is:

$(x+4)^2+(y-6)^2=81$

3 0

3 years ago