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1 year ago

I need of helppp please

Mathematics

1 answer:

Burka [1]1 year ago

4 0

Answer:

Step-by-step explanation:

The sides are in proportion.

$\frac{BC}{QR}= \frac{AB}{PQ}$
?/18 = 2/6
?/18 = 1/3
? = 18/3
? = <u>6</u>

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1. How many solitions does this equation have -4(5-3x)=12x+20

Rom4ik [11]

Answer:

1. no solutions

2. one solution

Step-by-step explanation:

1. -4(5-3x)=12x+20

-20+12x=12x+20

-40+12x=12x

-40=0?????

So no solutions.

2. 3x+7(x+1)=2(6x+5)+2

3x+7x+7=12x+10+2

10x+7=12x+12

-2x+7=12

-2x=5

x=-5/2

So one solution.

6 0

2 years ago

Read 2 more answers

a circular oil slick is expanding at a rate of 2m^2/h. Find the rate at which it's diameter is expanding when it's radius is 1.5

aleksandrvk [35]

Answer: $\frac{4\pi}{3} \text{ meter per hour}$

Step-by-step explanation:

The circular oil slick is expanding at a rate of $2 m^2/h$

Let A be the area of the circular oil slick,

So, the changes in A with respect to time (t),

$\frac{dA}{dt} = 2$

$\frac{d(\pi r^2)}{dt} = 2$

$2\pi r\frac{dr}{dt} = 2$

$\frac{dr}{dt} = \frac{1}{\pi r}$

Also, the change in diameter with respect to time(t),

$\frac{d}{dt} (2 r) = 2 \frac{dr}{dt}$

$\frac{d}{dt} (2 r) = 2 \times \frac{1}{\pi r}$

$\frac{d}{dt} (2 r) = \frac{2}{\pi r}$

For r = 1.5 m,

$\frac{d}{dt} ( 2 r)]_{r=1.5} = \frac{2}{\pi \times 1.5}=\frac{20}{\pi \times 15}=\frac{4\pi }{3}\text{ meter per hour}$

7 0

2 years ago

Circle the number that is 4 fewer than 8.

Anastaziya [24]

Answer:

the answer is 4

Step-by-step explanation:

8-4=4

6 0

3 years ago

Read 2 more answers

Determine the intercepts of the line

Elanso [62]

Answer:

y- (0,2.5) x-(3.5,0)

Step-by-step explanation:

This is because the intercepts of a graph are the points at which a line intersects with a desired axis. So for the Y axis the inercept would be at 2.5 making the y intercept (0,2.5). The same concept is used on the X axis.

5 0

2 years ago

Is 12/50 Grader than 4/5

Oliga [24]

Answer:

No, $\frac{4}{5}$ is greater than $\frac{12}{50}$ .

Step-by-step explanation:

The two fractions to be compared are given as:

$\frac{12}{50}$ and $\frac{4}{5}$

Now, in order to compare them, we need to make the denominator same for both the fractions and then compare their numerators.

LCD of 50 and 5 is 100. So, we try to make each denominator 100 and change the numerator accordingly.

We multiply the first fraction by $\frac{2}{2}$ and we multiply the second fraction by $\frac{20}{20}$ as given below:

$\frac{12\times 2}{50\times 2}=\frac{24}{100}\\\frac{4\times 20}{5\times 20}=\frac{80}{100}$

Now, the two new fractions are $\frac{24}{100}$ and $\frac{80}{100}$ .

Now, we check the numerators. The numerator that is larger among the two has the greater fraction value.

Here, 80 is greater than 24. So, fraction $\frac{80}{100}$ is greater than $\frac{24}{100}$ or $\frac{4}{5}$ is greater than $\frac{12}{50}$ .

7 0

3 years ago