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3 years ago

Solve the system by using substitution. y = 2x – 10 and - 6x – 2y = -10

Mathematics

2 answers:

lesantik [10]3 years ago

4 0

Make them both as y=mx+b for then make them equal each other. Should look like the picture I took.

Ann [662]3 years ago

3 0

Answer:

(3, -4) or x = 3 and y = -4

Step-by-step explanation:

Hope this helps!

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(2 thousands 7 tens) times 10

kodGreya [7K]

You can multiply the digits or the place value. Either way, you will get the same result.

(2 thousands, 7 tens) × 10 =

... (20 thousands, 70 tens)

... (2 ten-thousands, 7 hundreds)

8 0

3 years ago

A surveying team set up some equipment 104104 ft from the base of a tree in order to sight the top of the tree. From ground leve

jarptica [38.1K]

Answer:

Relative error = 0.0254 %

Step-by-step explanation:

Given details

Height of equipment from base is 104 ft

Elevation angle is 27.5 degree

From figure we have

$tan\theta = \frac{x}{104}$ .........1

$tan(27.5) = \frac{x}{104}$

x = 54.13 ft

differentiating 1st eq wrt x

$\frac{d}{dx} tan\theta = \frac{d}{dx} [\frac{x}{104}]$

$sec^2\theta \frac{d\theta}{dx} = \frac{1}{104}$

Taken $d\theta \ as \Delta x \ and\ dx = \Delta x$ for minute change

$\Delta x = 1.5% x$

$= 0.015 \times 54.13 = 0.8119 ft$

from $sec^2 \theta \frac{d\theta}{dx} = \frac{1}{104}$

$\Delta \theta = \frac{1}{104 sec^2 \theta} \Delta x$

$\Delta \theta = \frac{1}{104 \times 1.115} 0.8119$

$\Delta \theta = 0.007$

Reltaive error $= \frac{\Delta \theta}{\theta} \times 100$

$= \frac{0.007}{27.5}\times 100$

Relative error = 0.0254 %

4 0

4 years ago

Which ordered pair is a solution the the following system?

muminat

Answer:

d is the correct answer .

Step-by-step explanation:

I just guessed

4 0

3 years ago

In the number 9,206.457138, what is the value of 1?

Aliun [14]

Answer:

0.0001 or 1/10000 or 1 ten thousandths

Step-by-step explanation:

The 1 is 4 places after the decimal point so has a value of :

0.0001 or 1/10000 or 1 ten thousandths

Hope this helped and have a good day

5 0

2 years ago

Which of the sets of ordered pairs represents a function? A={(-4, 5), (1, -1), (2, -2), (2, 3)} B = {(2, 2), (3, -2). (9. 3). (9

EastWind [94]

Answer: Neither A or B

Step-by-step explanation: In order for a relation to be a function, a relation can not have the x-values repeat. Y-values can repeat an infinite amount of times but x-values can only repeat 1 time in a given relation. In relation A, you have (2,-2), and (2,3) and relation B, you have (9,3), and (9,-3). You can also graph both of these relations and do a vertical line test with your pencil and see that it would cross more than once.

Hope this helps.

7 0

2 years ago

Read 2 more answers