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Alchen [17]
2 years ago
13

How many solutions are there to each of these equations?

Mathematics
1 answer:
Sloan [31]2 years ago
6 0

Answer:

first one, put value of x= -3 and y = 0

second one, pit vale of x=7 and y= -7

Step-by-step explanation:

first one,

-14(-3) -20(0) =42

or, 42-0 = 42

or, 42 = 42

proved

second one,

-14(7) -20(-7) = 42

or, -98 + 140=42

or, 42 = 42

proved

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alexgriva [62]
You subtract y from 425, I can read #5 or is help
4 0
3 years ago
What is the length of BC?
Alekssandra [29.7K]

Answer:

2.1

Step-by-step explanation:

This involves trigonometry. Since we need to find the value of a, we need to find a trig equation with a as the numerator. Luckily, we have one, tan. So, tan(20) is equal to a/6, right. So, using a calculator, tan(20) is approximately equal to 0.363. This times 6 should equal a. This is approximately around 2.1. Thus our answer is 2.1

6 0
2 years ago
Please help me with this question <br><br> image attached
Sveta_85 [38]

Answer: 60°


Step-by-step explanation: use exterior angle property,

therefore, y+70°=130°

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7 0
2 years ago
The volume of a spherical sculpture is 256 ft³. Rhianna wants to estimate the surface area of the sculpture. To do the estimate,
Brrunno [24]

Answer:

192 ft^2

Step-by-step explanation:

Given that

Volume of spherical sculpture = 256 ft³

\pi is used as 3.

To find:

Surface area of sculpture = ?

Solution:

First of all, let us learn about the formula for Volume and Surface Area of Sphere:

1. Volume =\frac{4}{3}\pi r^3

2. Surface\ Area = 4\pi r^2

Given volume is 256 ft³.

256 = \dfrac{4}{3}\pi r^3\\\Rightarrow 256 = \dfrac{4}{3}\times 3 r^3\\\Rightarrow 256 = 4 r^3\\\Rightarrow r^3=64\\\Rightarrow \bold{r = 4\ ft}

Now, let us put r = 4 in the formula of Surface Area to find the value of Surface Area:

Surface\ Area = 4\pi 4^2 = 4 \times 3 \times 16 = \bold{192\ ft^2}

So, approximate surface area of sculpture is 192 ft^2.

3 0
2 years ago
Solve for m. y=7m+6<br>solve for b. A=6b
ryzh [129]

y=7m+6

subtract 6 from each side

y-6 = 7m

divide by 7

(y-6)/7 =m


A = 6b

divide by 6

A/6 = b

8 0
3 years ago
Read 2 more answers
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