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azamat
2 years ago
6

If x2 - 4 = 45, then x could be equal to 9 3 5 -7 -4

Mathematics
1 answer:
Ivanshal [37]2 years ago
5 0
Transpose the constant on the left hand side of the equation to the right side. The equation becomes x² = 45 + 4, 
                                               x² = 49
                                           x = sqrt(49) 
                                            x = 7 and x = -7
Only -7 is on the choices. Thus, the answer is x = -7.
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Angle A is shown below.<br>What is the measure of LA, in degrees?​
Vesna [10]

The measure of angle A is 55°.

Solution:

Let us take B be the adjacent angle of 145°.

<em>Sum of the adjacent angles in a straight line = 180°</em>

⇒ m∠B + 145° = 180°

Subtract 145° from both sides.

⇒ m∠B + 145° - 145° = 180° - 145°

⇒ m∠B = 35°

The adjacent angle of 145° is 35°.

In the image, angle B and angle A equal to 90°.

⇒ m∠B + m∠A = 90°

⇒ 35° + m∠A = 90°

Subtract 35° from both sides.

⇒ m∠A = 55°

The measure of angle A is 55°.

8 0
3 years ago
What is the answer to this math problem: -6y+19=1+5+7y
lozanna [386]

Answer:

1

Step-by-step explanation:


6 0
3 years ago
Read 2 more answers
1. Iris has two ribbons. The first ribbon is 11.7 in. long. The second ribbon is 5.25 in. long. She wants to cut them so that th
lisov135 [29]
The estimated lengths are 12in. and 5 in. This would be an estimated difference of 7in.


The estimated difference is going to be higher than the actual difference because in rounding 11.7 to 12, you are losing .30in, but in rounding down 5.25 to 5, you are actually gaining .75in.


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3 0
3 years ago
98 points!!
k0ka [10]

The formula for an exponential equation is y = a * b^x with a and b being a fixed value.

"a" would also be the Y intercept, which is where the graph touches or crosses the Y axis. In the given graph, the curved line touches the Y axis at 100, so the value of a would be 100.

Now we need to find b.

The blue dot at Y 50 is lined up with x = 1, so we can use the point (1,50)

Using the X and Y values we can solve for b:

format: y = a * b^x we replace the letters with the numbers above:

50 = 100 * b^1

b^1 = b so now we have:

50 = 100 *b

Divide both sides by 100 to get b by itself:

b = 50/100, which reduces to 1/2, so b = 1/2

So the equation of the graph becomes y = 100(1/2)^x

You may need to write the 1/2 as 0.5, not sure how you need to enter it.

6 0
3 years ago
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George tells you that when variables are in the denominator, the equation becomes unsolvable. "There is a value for x that makes
lyudmila [28]
The equation can still be solved but it should be stated clearly at what value of would the equation be undefined. For instance, you have an expression,

1/x+2

When x is equal to -2, the denominator will be 0 resulting to an undefined solution. The value of x here can be any real number except -2.
7 0
2 years ago
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