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3 years ago

HELP QUICK PLEASEE THANKS

Mathematics

2 answers:

ZanzabumX [31]3 years ago

8 0

(-9)+(-4) = -13

the answer is C

Ratling [72]3 years ago

5 0

The answer would be -13

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What part of a a dozen is 8?

Murljashka [212]

Answer:

$\frac{2}{3}$

0.67

Step-by-step explanation:

a dozen is 12

12/4 = 3

8/4 = 2

8 is 2/3 of a dozen(12)

2/ 3 = 0.66666666666667 which is about 0.67

6 0

2 years ago

Read 2 more answers

Computer keyboard failures are due to faulty electrical connects (8%) or mechanical defects (92%). Mechanical defects are relate

sdas [7]

Solution :

Faulty electrical connects = P(A) = 0.80

Mechanical defects = P(B) = 0.92

Mechanical defects are related to loose keys = P(C/B) = 0.27

Improper assembly = P(D/B) = 0.73

Defective wires = P(E/A) = 0.35

Improper connections = P(F/A) = 0.13

Poorly welded wires = P(G/A) = 0.52

Now, the probability due to loose keys = 0.27 x 0.92 = 0.2484

Improperly connected = 0.13 x 0.80 = 0.1040

Poorly welded wires = 0.52 x 0.80 = 0.4160

So, the probability that a failure is due to improperly connected or poorly welded wires = 0.1040 + 0.4160

= 0.5200

8 0

2 years ago

How do I know if an equation has one solution no solution or infinitely many solutions?

Lemur [1.5K]

Answer: If the equation ends with a false statement (ex: 0=3) then you know that there's no solution. If the equation ends with a true statement (ex: 2=2) then you know that there's infinitely many solutions or all real numbers.

Step-by-step explanation:

3 0

2 years ago

please help as soon as possible-Solve the right triangle shown in the figure. WIll mark brainliest to first correct answer

Dennis_Churaev [7]

Answer:

option a is the correct answer; ∠A = 68°, ∠B = 22°, AB = 2.9 cm

Step-by-step explanation:

From my understanding, we have to find angle A, angle B and side AB.

Step 1: Find side AB

AB can be solved through the Pythagoras theorem.

c² = a² + b²

c² = 2.7² + 1.1²

c² = 8.5

c = √8.5

c = 2.9 cm

Step 2: Find angle A

Angle A can be found through tan formula

tan (angle) = opposite/adjacent

tan (angle A) = BC/AC

tan (angle A) = 2.7/1.1

Angle A = tan inverse (2.7/1.1)

Angle A = 68°

Step 3: Find angle B

All 3 angles of a triangle are equal to 180°

Angle A + Angle B + Angle C = 180°

68 + B + 90 = 180°

Angle B = 22°

option a is the correct answer; ∠A = 68°, ∠B = 22°, AB = 2.9 cm

6 0

3 years ago

Find the dimensions of the rectangular box with largest volume if the total surface area is given as 4 cm2. (Let x, y, and z be

Scorpion4ik [409]

Answer:

The dimensions of the rectangular box, x = y = z = 0.817 cm

Step-by-step explanation:

Given;

total surface area of the rectangular box or cuboid = 4 cm²

A rectangular box with largest volume is a cube.

The total surface area of a cube = 6 times square of one edge length.

Let the edge length = given dimensions, x, y, z

x = y = z

6x² = 4

x² = 4/6

$x =\sqrt{\frac{4}{6} }\\\\ x = \frac{2}{\sqrt{6} } \ cm \ = 0.817 \ cm$

Therefore, the dimensions of the rectangular box, x = y = z = 0.817 cm

7 0

3 years ago