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4 years ago

2+ x/-10 = 2/5 A. -16 B -24 C. 16 D. 24

Mathematics

2 answers:

Minchanka [31]4 years ago

7 0

Answer:

Step-by-step explanation:

Given

2 + $\frac{x}{-10}$ = $\frac{2}{5}$

Multiply through by - 10 to clear the fractions

- 20 + x = - 4 ( add 20 to both sides )

x = 16

liberstina [14]4 years ago

5 0

Answer:

c. 16

Step-by-step explanation:

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What is the measure of angle BAC a. 100 b. 65 c. 50 d. 40

Y_Kistochka [10]

Answer:

Step-by-step explanation:

aCb is 100

if we continue the straight line from a c to the edge ( lets say D) it leaves arc BD with a measure of 8, an inscribed angel is half the measurement of the arc

7 0

4 years ago

The equation w+bw+36=0 has a unique solution if b=___ or b=____

vodka [1.7K]

Step-by-step explanation:

Answer is b=5 or b=11

In addtion 1

W=-6

-6+5*-6=-36

In addtion 2

W=-3

-3+11*-3=-36

5 0

2 years ago

Read 2 more answers

Talia tossed a penny many times. She got 30 heads and 70 tails. She said the experimental probability of getting heads was 30 70

-BARSIC- [3]

Answer:

The experimental probability of landing on heads is 0.3

Step-by-step explanation:

We are given the following in the question:

Number of heads = 30

Number of tails = 70

Talia said the probability of getting heads is $\frac{30}{70}$ .

She evaluated the wrong probability.

She did not considered total number of trials in the experiment.

Formula for probability:

$\text{Probability} = \displaystyle\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}$

Probability of heads =

$P(H) = \dfrac{30}{30+70} = \dfrac{30}{100} =0.3$

The experimental probability of landing on heads is 0.3

4 0

3 years ago

Multiply the polynomial 2x(x−3) A)2x^2-6x B)2x-6 C)x^2-6

dlinn [17]

Multiply 2x by each term in the parentheses:

2x(x - 3)
2x^2 - 6x

Answer:
2x^2 - 6x

6 0

3 years ago

On his outward journey, Ali travelled at a speed of s km/h for 2.5 hours. On his return journey, he increased his speed by 4 km/

den301095 [7]

Answer:

3.08 km/h.

Step-by-step explanation:

We know that,

$Speed=\dfrac{Distance}{Time}$

Ali traveled at a speed of s km/h for 2.5 hours.

Let d be the distance and t be the time.

$2.5=\dfrac{d}{t}$

$2.5t=d$ ...(1)

On his return journey, he increased his speed by 4 km/h and saved 15 minutes. So, distance is d and times is t-15.

$4=\dfrac{d}{t-15}$

$4(t-15)=d$ ...(2)

From (1) and (2), we get

$4(t-15)=2.5t$

$4t-60-2.5t=0$

$1.5t=60$

$t=40$

Put t=40 in (1).

$d=2.5(40)=100$

So, t=40 and d=100.

Now,

Total distance = d + d = 100 + 100 = 200

Total time = t + t - 15 = 40 + 40 - 15 = 65

So, the average speed is

$\text{Average speed}=\dfrac{\text{Total distance}}{\text{Total time}}$

$\text{Average speed}=\dfrac{200}{65}$

$\text{Average speed}\approx 3.08$

Therefore, the average speed is 3.08 km/h.

3 0

4 years ago