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3 years ago

25 pts. Please help. Explain and brainliest if your correct!!

Mathematics

1 answer:

Eva8 [605]3 years ago

5 0

$Well..\;\mathrm{x-intercept\:is\:a\:point\:on\:the\:graph\:where\:}y=0$

$9=0 \ \textgreater \ False \ \textgreater \ \mathrm{No\:x-axis\:interception\:points}$

$y\mathrm{-intercept\:is\:the\:point\:on\:the\:graph\:where\:}x=0 \ \textgreater \ y=9$

$Therefore\;the\;y-intercept\;is\;\left(0,\:9\right)$

Hope this helps!

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Lines A and B are parallel lines cut by a transversal find the value of x

irga5000 [103]

Answer: x = 13

Step-by-step explanation:

8x + 2 = 14x - 76

78 = 6x

x = 13

7 0

3 years ago

PLEASE HELP

sweet [91]

To model and solve our situation we are going to use the equation: $s= \frac{d}{t}$
where
$s$ is speed
$d$ is distance
$t$ is time

1. We know that the distance between the cities is 2400 miles, so $d=2400$ . We also know that the speed of the plane is 450 mi/h. Since we don't know the speed of the air, $S_{a}=?$ . We don't know how much the westward trip takes, so $t_{w}=?$ , and we also don't know how much the eastward trip takes, so $t_{e}=?$ .

Going westward. Here the plane is flying against the air, so we need to subtract the speed of the air from the speed of the plane:
$450-S_{a}= \frac{2400}{t_{w} }$
Going eastward. Here the plane is flying with the the air, so we need to add the speed of the air to the speed of the plane:
$450+S_{a}= \frac{2400}{t_{e} }$

2. We know for our problem that the round trip takes 11 hours; so the total time of the trip is 11, $t_{t}=11$ . Notice that we also know that the total time of the trip equals time of the tip going westward plus time of the trip going eastward, so $t_{t}=t_{w}+t_{e}$ . Since we know that the total trip takes 11 hours, we can replace that value in our total time equation and solve for $t_{w}$ :
$11=t_{w}+t_{e}$
$t_{w}=11-t_{e}$

Now we can replace $t_{w}$ in our going westward equation to model our round trip with a system of equations:
$450-S_{a}= \frac{2400}{t_{w}}$
$450-S_{a}= \frac{2400}{11-t_{e} }$ equation (1)
$450+S_{a}= \frac{2400}{t_{e}}$ equation (2)

3. To solve our system of equations, we are going to solve for $t_{e}$ in equations (1) (2):

From equation (1)
$450-S_{a}= \frac{2400}{11-t_{e} }$
$11-t_{e}= \frac{2400}{450-S_{a} }$
$-t_{e}= \frac{2400}{450-S_{a} } -11$
$t_{e}=11- \frac{2400}{450-S_{a} }$
$t_{e}= \frac{4950-11S_{a} -2400}{450-S_{a} }$
$t_{e}= \frac{2550-11S_{a} }{450-S_{a} }$ equation (3)

From equation (2):
$450+S_{a}= \frac{2400}{t_{e} }$
$t_{e}= \frac{2400}{450+S_{a} }$ equation (4)

Replacing (4) in (3)
$\frac{2400}{450+S_{a}} = \frac{2550-11S_{a}}{450-S_{a} }$
Now, we can solve for $S_{a}$ to find the speed of the wind:
$2400(450-S_{a})=(450+S_{a})(2550-11S_{a})$
$1080000-2400S_{a}=1147500-4950S_{a}+2550S_{a}-11(S_{a})^{2}$
$11(S_{a})^{2}-67500=0$
$11(S_{a})^{2}=67500$
$(S_{a})^{2}= \frac{67500}{11}$
$S_{a}=+/- \sqrt{ \frac{67500}{11} }$
Since speed cannot be negative, the solution of our equation is:
$S_{a}= \sqrt{ \frac{67500}{11} }$
$S_{a}=78.33$

We can conclude that the speed of the wind is 78 mph.

3 0

4 years ago

What do you mean by measurement

DochEvi [55]

Answer:

tor maytafahsjsjbshwgdhxhxhqjx

4 0

3 years ago

Read 2 more answers

What does this mean and how do u solve it?

DochEvi [55]

The current Brainliest answer seems to be answering the question "Every integer is a multiple of which number?" rather than the question presented here.

We say that one number is a multiple of a second number if we can get to the first one by counting by the second. For example, 18 is a multiple of 6 because we can reach it by counting by 6's (6, 12, 18). Note that, for any number we want to count by, we can always start our count at 0.

By 2's: 0, 2, 4, 6, 8

By 6's: 0, 6, 12, 18

By 7's: 0, 7, 14, 21

Because we can always "reach" 0 regardless of the integer we're counting by, we can say that 0 is a multiple of every integer.

More formally, we say that some number n is a multiple of an integer x if we can find another integer y so that x · y = n. By this definition, 18 would be a multiple of 6 because 6 · 3 = 18, and 3 is an integer. We can use the property that the product of any number and 0 is 0 to say that x · 0 = 0, where x can be any integer we want. Since 0 is also an integer, this means that, by definition, 0 is a multiple of every integer.

6 0

4 years ago

Simplify. (-2/3) - (3/5)

yKpoI14uk [10]

Okay so here you go

Decimal Form: -1.266667

Fraction form: -19/15

hears how:
Simplify brackets
-2/3 - 3/5

Simplify: -19/15

5 0

3 years ago

Read 2 more answers