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makvit [3.9K]
3 years ago
5

PLSSSSSSSS HELP (2 + 7i) - (6 + 8i) + (10 - 10i)

Mathematics
1 answer:
ElenaW [278]3 years ago
7 0

Answer:

6-11i

Step-by-step explanation:

(2 + 7i) - (6 + 8i) + (10 - 10i)

Distribute the minus sign

(2 + 7i) - 6 - 8i + (10 - 10i)

Combine like terms

2-6 +10     +7i-8i-10i

6                 -11i

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A cashier worked an 8-hour day, and earned $58.00. The double number line shows the amount she earned for working different numb
pav-90 [236]

Answer:

$7.25=1hr      $21.75=3hrs

Step-by-step explanation:

$58=8hrs

58/8=7.25

$7.25=1hr

7.25x3=21.75

$21.75=3hrs

Hope this helps :)

8 0
2 years ago
You need 1 1/4 cup of sugar to make 20 cookies to make 12 cookies how much sugar do you need​
solniwko [45]
3/4 bc 1 1/4 divided by 20 is 1/16. 1/16 times 12 is 3/4
5 0
2 years ago
The equation of the tangent to the curve x^2 = 4y at the point on the curve where x=-2 is?
aleksandrvk [35]
x^2 = 4y \Rightarrow y= \frac{x^2}{4}
\frac{dy}{dx} = \frac{2x}{4} =  \frac{x}{2}

(x = -2) \frac{dy}{dx} = \frac{x}{2} =  \frac{-2}{2} = -1
(x = -2) y= \frac{x^2}{4}= \frac{(-2)^2}{4}  = 1

y-y_1=m(x-x_1)
y-1 = -1(x--2)

y-1 = -1(x+2)
y-1 = -x-2
y=-x-1 = -(x+1)

7 0
3 years ago
Read 2 more answers
At a fabric store, fabrics are sold by the yard. A dressmaker spent $36.35 on 4.25 yards of silk and cotton fabrics for a dress.
vaieri [72.5K]

Given:

The system of equations that represent the constraints for the given situation is

x+y=4.25

16.90x+4y=36.35

To find:

The solution of given system of equations.

Solution:

We have,

x+y=4.25           ...(i)

16.90x+4y=36.35           ...(ii)

Multiply equation (i) by 4.

4x+4y=17           ...(iii)

Subtracting (iii) from (ii), we get

16.90x+4y-(4x+4y)=36.35-17

16.90x+4y-4x-4y=19.35

12.90x=19.35

Divide both sides by 12.90.

x=\dfrac{19.35}{12.90}

x=1.5

Put this value in (i).

1.5+y=4.25

y=4.25-1.5

y=2.75

The solution of system of equations is x=1.5 and y=2.75. It means, the yards of silk are 1.5 and yards of cotton are 2.75.

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3 years ago
How does an increase in thermal energy affect molecules?
zheka24 [161]

Answer:

The molecules become more active and it expands.

Step-by-step explanation:

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3 years ago
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