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Mkey [24]
3 years ago
13

I need help please and thank you

Mathematics
1 answer:
STatiana [176]3 years ago
4 0

Answer:

∠A = 45°

Step-by-step explanation:

The sum of angles in a triangle = 180°.

That means in the triangle ABC, ∠A + ∠B + ∠C = 180°.

Given ∠B = 90° and ∠C = 45°.

⇒ ∠A + 90° + 45° = 180°

⇒ ∠A = 180 - 90 - 45

⇒ ∠A = 45° is the required answer.

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5% of what number is 65
Inessa05 [86]
1,300
If 5% of x, a number, is 65, to find the number you would multiply 65 by 20 because 100 divided by 5 is 20.
So the answer would be 1,300.
4 0
3 years ago
What is the reference angle for a 225 degree angle? A coordinate plane in degrees is posted to help you.
vova2212 [387]

Answer:

Hey, chloeholton29! Your answer is 25 degrees!

If I helped you, mark me brainliest!!

5 0
2 years ago
The sum of two numbers is -5, and the sum of the squares of the two numbers is 17. What are the two numbers? Explain your reason
guapka [62]

The two numbers are <u>-4 and -1.</u>

<h3>EXPLANATION</h3>

-4 + -1 = <u>-5</u>

-4  x -4 = 16

-1 x -1 = 1

16 + 1 = <u>17</u>

6 0
3 years ago
A cylindrical tube 9.5 cm high and 0.85 cm in diameter is used to collect blood samples. How many cubic decimeters (dmଷ ) of blo
Brums [2.3K]

Answer: 0.539 cubic decimeters of blood can be hold by the cylinder.

Step-by-step explanation:

Volume of cylinder= volume of blood it can hold = \pir^2h

Given :

Height of cylinder (h) = 9.5 cm

Diameter of cylinder (d) = 0.85 cm

Thus radius of cylinder (r) = \frac{\text {Diameter of cylinder}}{2}=\frac{0.85cm}{2}=0.425cm

Putting the values we get:

Volume of cylinder= volume of blood it can hold = 3.14\times (0.425cm)^2\times 9.5cm=5.39cm^3=0.539dm^3 [tex]      (1cm=0.1dm)

Thus 0.539 cubic decimeters of blood can be hold by the cylinder.

4 0
3 years ago
Can someone turn 4,971 into a scientific notation
Illusion [34]

We need to divide 4,971 by 10 until its a number less then 10.

4,971 / 10 = 497.1

497.1 / 10 = 49.71

49.71 / 10 = 4.971

Now, 4.971 is less then 10, so, we can write this into scientific notation.

4.971 * 10^?

We need to know what power we add to 10 to get 4,971. We can solve for looking at the number of times we divided. As you can see above, we divided 3 times so that will be the power of 10.

4.971 * 10³

Best of Luck!

6 0
3 years ago
Read 2 more answers
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