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Fed [463]
3 years ago
5

What is the result of adding these two equations?

Mathematics
1 answer:
Marina86 [1]3 years ago
7 0

Answer:

-2x-7y=-4

Step-by-step explanation:

We want to add the two expressions

\begin{aligned} 5x-9y &= 1 \\ -7x+2y &= -5 \end{aligned}

First we add the Left Hand Sides and do the same to the Right Hand Sides. This gives us:

(5x-9y)+(-7x+2y)= 1 +( -5)

Open the brackets

5x-9y-7x+2y=1-5

Regroup like terms

5x-7x-9y+2y=-4

-2x-7y=-4

The result of adding the two given expressions is -2x-7y=-4.

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58,927 in scientific notation
Vaselesa [24]
5.892700e+4 +
0.000000e+0 =
<span>5.892700e+4</span>
8 0
3 years ago
Please answer this in two minutes
diamong [38]

Answer:

366.6 mm²

Step-by-step explanation:

Step 1: find XY using the Law of sines.

Thus,

\frac{XY}{sin(W)} = \frac{WY}{sin(X)}

m < W = 180 - (70+43) (sum of angles in a triangle)

W = 180 - 113 = 67°

WY = 24 mm

X = 43°

XY = ?

\frac{XY}{sin(67)} = \frac{24}{sin(43)}

Cross multiply:

XY*sin(43) = 24*sin(67)

XY*0.68 = 24*0.92

Divide both sides by 0.68 to solve for XY

\frac{XY*0.68}{0.68} = \frac{24*0.92}{0.68}

XY = 32.47

XY ≈ 32.5 mm

Step 2: find the area using the formula, ½*XY*WY*sin(Y).

Area = ½*32.5*24*sin(70)

Area = ½*32.5*24*0.94

= 32.5*12*0.94

Area = 366.6 mm² (nearest tenth)

6 0
3 years ago
If c(x)=5/x-2 and d(x)=x+3, what is the domain of (cd)(x)?
Masja [62]
(df)x that is the domain of (CD)(x)
3 0
3 years ago
Answer choices are<br> a. 90<br> b. 40<br> c. 10<br> d. 50<br><br> please help
Andrei [34K]
Answer: d. 50

Steps:

1. Find value of x.

5x + 4x = 90

9x = 90

x = 10


2. Use x value to find ∠EDH.

∠EDH = 5x

∠EDH = 5(10)

∠EDH = 50°
7 0
3 years ago
Read 2 more answers
A countertop is 16 feet long and 3 feet wide. what is the area of the countertop in square meters.
Mrac [35]
Area=legnth times width
legnth=16 ft
width=3 ft
but wait, they want the area in squazre METERS
so convert feet to meters
1 foot=0.3048 meters

convert 16 feet and 3 feet to meters

16 feet=16 times 0.3048=4.8768
3 feet=3 times 0.3048=0.9144

so the area is now
legnth=4.8768 m
width=0.9144m

area=4.8768 m times 0.9144 m=4.45934592
round
4.0
answer is 4 square METERS

4 m^2

8 0
3 years ago
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