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3 years ago

Write and solve an equation to determine the value of x.

Mathematics

1 answer:

uysha [10]3 years ago

5 0

Answer:

x = 12

Step-by-step explanation:

<CED = 180 - (9x-8)

= 180 - 9x +8

= 188 - 9x

Angle sum of triangle is 180

.'. (5x-10) + (50) + (180 - 9x +8) = 180

5x -10 + 50 + 188 -9x = 180

-4x = 180 + 10 - 50 - 188

-4x = -48

4x = 48

x = 12

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There are 12 red marbles and 8 green marbles in a bag. What is the probability of selecting a red

madam [21]

Answer:

The probability of selecting a red marble, not replacing it, and then selecting a green marble from the bag is 24/95

Step-by-step explanation:

Number of red marbles = 12

Number of green marbles = 8

Total number of marbles = 12+8 = 20

Probability of selecting red marble = $\frac{12}{20}$

Since it is the case of no replacement

Remaining marbles = 20-1 = 19

Number of red marbles = 12-1=11

Number of green marbles = 8

Probability of selecting green marble = $\frac{8}{19}$

So, the probability of selecting a red marble, not replacing it, and then selecting a green marble from the bag = $\frac{12}{20} \times \frac{8}{19}=\frac{24}{95}$

Hence the probability of selecting a red marble, not replacing it, and then selecting a green marble from the bag is 24/95

3 0

4 years ago

Please help me with number 7

Wittaler [7]

"twelve decreased by twice a number" ---> 12 - 2x

"8 times the sum of number and 4" ---> 8(x + 4)

12 - 2x = 8(x + 4)

12 - 2x = 8x + 32 (distributive property)

12 = 10x + 32 (add 2x to both sides)

-20 = 10x (subtract 32 from both sides)

x = -2 (divide both sides by 10)

That's answer.

4 0

3 years ago

Given p (x) = 5x - 6 what is the value of p ( 2/5)<br><br>Help me please quick! please

cluponka [151]

Answer:

p(2/5)=-4

Step-by-step explanation:

Plug in 2/5 for x

p(2/5)=5(2/5)-6

Combine like terms

p(2/5)=2-6

p(2/5)=-4

8 0

3 years ago

Find the circumference of a circle with radius 10.3 feet . Round your answer to two decimal places.

patriot [66]

C= 2πr

r= 10.3ft

π= 22/7

C= 2×22/7 × 10.3

C= 64.74 feet

5 0

3 years ago

Read 2 more answers

How many ways can we add three non negative integers to get n?

Rzqust [24]

That would be = 3! = 3*2*1 = 6 answer

4 0

3 years ago

Write and solve an equation to determine the value of x.​

Write and solve an equation to determine the value of x.