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Svetradugi [14.3K]
3 years ago
8

Two more than 4 times a number is -18.

Mathematics
2 answers:
Anna71 [15]3 years ago
4 0
The answer is the third one
Alex3 years ago
3 0

Answer:

4x + 2 = - 18

Step-by-step explanation:

Hope this helps

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Help please urgent!
myrzilka [38]

Answer:

5

Step-by-step explanation:

8 0
3 years ago
Find the slope of the line that passes through the points (1, 1) and (7, 5).
Nata [24]

Step-by-step explanation:

m=y²-y¹/x²-x¹

m=5-1/7-1

m=4/6

m= 2/3

The slope is 2/3

7 0
3 years ago
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If Clare earns $75 the next week from delivering newspapers and deposits it in her account, What will her account balance be the
alexira [117]

Answer: $15

Step-by-step explanation:

-$50 + $75 = $15

3 0
3 years ago
Please Help. I really don’t get this concept, if you could explain it in detail it would be very appreciated
Dafna11 [192]
<h3>Answer: 24/25</h3>

=================================================

Explanation:

Sine is given to be negative, and so is tangent. This only happens in quadrant Q4

Recall that y = sin(theta), so if sin(theta) < 0, then we're below the x axis.

If tan(theta) < 0, then this means cos(theta) > 0

So we have y < 0 and x > 0 which places the angle somewhere in Q4.

--------------------------

Draw a right triangle as shown below in the attached image. We have AC = 25 and BC = 7. Use the pythagorean theorem to find that AB = 24

So this is what your steps may look like

a^2+b^2 = c^2

7^2+b^2 = 25^2

b^2+49 = 625

b^2 = 625-49

b^2 = 576

b = sqrt(576)

b = 24

So because AB = 24, we know that the cosine of the angle is adjacent/hypotenuse = 24/25

---------------------------

As an alternative, you could use the trig identity

sin^2(x) + cos^2(x) = 1

and plug in the given value of sine to solve for cosine. The cosine value result will be positive since we're in Q4.

So,

sin^2(x) + cos^2(x) = 1

(-7/25)^2 + cos^2(x) = 1

(49/625) + cos^2(x) = 1

cos^2(x) = 1 - (49/625)

cos^2(x) = (625/625) - (49/625)

cos^2(x) = (625-49)/625

cos^2(x) = 576/625

cos(x) = sqrt(576/625)

cos(x) = sqrt(576)/sqrt(625)

cos(x) = 24/25

This is effectively a rephrasing of the previous section since the pythagorean trig identity is more or less the pythagorean theorem (just in a trig form)

6 0
3 years ago
Which point is located at the origin?<br><br> A<br> B<br> C<br> D
Alina [70]
A because the origin is at 0,0 and point A is at 0,0
4 0
3 years ago
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