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2 years ago

PLZZZ HELP WHAT IS THIS:) <3

Mathematics

2 answers:

Shalnov [3]2 years ago

7 0

The answer to #4 is A)7.5 m
The answer to #5 is C)28.3 cm

7nadin3 [17]2 years ago

4 0

A^2 + b^2 = c^2 in right triangles.
4^2 + b^2 = 8.5^2
16 + b^2 = 72.25
b^2 = 56.25
b = 7.5

You might be interested in

Add 4 kg 250 g, 2 kg 90 g and 19kg 3 g.

GarryVolchara [31]

Answer:

=25343 grams or 25 kg 343 g.

Step-by-step explanation:

1 kg = 1000 g

∴ 4 kg = 4000 grams

and the 4 kg 250 g would equal = 4250 grams.

∴ 2 kg = 1000 g

2 kg 90 g = 2000 grams + 90 g = 2090 grams

∴ 19 kg = 19000 grams

and 19 kg 3 grams = 19000 grams + 3 grams = 19003 grams

now we will add all of the values together to get the final answer.

4250 grams + 2090 grams + 19003 grams = 25343 grams or 25 kg 343 g.

Hope this helps!!

8 0

2 years ago

29. Which of the following expressions will result in a real answer after being simplified? Select all that apply.

nexus9112 [7]

Answer: A, B, C, and E

Step-by-step explanation:

If both sides are real numbers, then the product will be a real number.

If in at least one of the sides we have a complex number, then the product will be real if:

The other number is zero.

The other number is the conjugate of the first.

This is when:

Suppose we have a number:

z = a + b*i

The conjugate will be:

w = a - b*i

And the product between them is:

(a + b*i)*(a - b*i) = a^2 + a*b*i - a*b*i + b^2 = a^2 + b^2

Then the options that will have a real answer are:

A. (4+5i)(4-5i) = 4^2 + 5^2 = 16 + 25 = 41

B. (4 + 91)*(41 - 9) = 3040

C. (3 + 2*i)*(3 -2*i) = 3^2 + 2^2 = 9 + 4 = 13

E. (312 + 7i)*(312 - 7i) = 312^2 + 7^2 = 97,393

5 0

2 years ago

Need help ASAP <br> 15pts <br> Must answer all questions in photo

Tcecarenko [31]

Answer:

The answers to the first three problems are shown in the figure attached

Fourth problem answer: 3.5 cm

Step-by-step explanation:

In problem 1, move the given triangle ABC four units to the right and 2 units down as what the displacement vector "v" indicates.

You may do such by translating each vertex of the triangle ABC such number of units one at a time and then joining the vertices.

In problem 2 the requested translation vector "v" indicates 4 units to the right and 1 unit up. Do such translation for each vertex of the triangle as suggested before.

In problem 3 the requested translation "v" asks for 2 units to the left and 3 up.

Do the translation of each vertex following these instructions.

Problem 4: use a ruler and notice that the length of the vector xy given has exactly the same length as the distance between the vertices A in one triangle, and A' in the other. The same is true for the distance between vertex B and B' in the other triangle, and for the distance between C and C'.