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Wittaler [7]
3 years ago
15

Please help me out.I need the answer

Mathematics
1 answer:
Alchen [17]3 years ago
5 0
Hector accidentally subtracted -2x from 7x instead of adding it. Therefore, in step 2, the correct equation should be

9x = 15
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I don't understand this question
padilas [110]

Answer:

105 rooms

Step-by-step explanation:

quarter=1/4

total rooms=140

rooms cleaned=1/4×140=35

140-35=105

therefore total rooms remaining are 105 rooms

hopes this helps

brainliest pls

7 0
1 year ago
find the gradient of the line joining (3,7) and (6,9). Hence, find the acute angle it makes with the positive x-y axis​
stiv31 [10]

Answer:

33.7 degrees

Step-by-step explanation:

As we go from (3,7) to (6,9), x increases by 3 and y increases by 2.  Thus, the gradient (slope) of the line connecting these two points is

m = rise / run = 2/3.  Using the slope-intercept formula y = mx + b, we obtain

7 = (2/3)(3) + b, or 7 = 2 + b, so we see that b = 5 and y = (2/3)x + 5.  The y-intercept is (0, 5).

Next we find the x-intercept.  We set y = (2/3)x + 5 = to 0 and solve for x:

(2/3)x = -5, or (3/2)(2/3)x = -5(3/2), or x = -15/2, so that the x-intercept is

(-15/2, 0).  This line intersects the x-axis at (-15/2, 0).

Now look at the segment of this line connecting (-15/2, 0) and (0, 5).  Here x increases by 15/2 and y increases by 5, and so the tangent of the acute angle in question is

tan Ф = 5 / (15/2) = 10 / 15 = 2/3.

Using the inverse tangent function, we get Ф = arctan 2/3, or approx.

33.7 degrees.

I believe you meant "the acute angle it makes with the positive x-axis."​

3 0
3 years ago
Write the slope of the line (–12, -6) and (8, 9).<br> m=4/3<br> m=-3/4<br> m=-4/3<br> m=3/4
Greeley [361]

Answer:

m=3/4

Step-by-step explanation:

3 0
3 years ago
Simplify cos θ sec θ.
cupoosta [38]
Here you go :) ......

4 0
3 years ago
Read 2 more answers
The radius of a sphere, r, is given by the formula below, where s is the surface area of the sphere. A spherical balloon has a m
liraira [26]
The formula for the radius of a sphere is:
r(s) = sqrt[s/(4pi)]
This is based on the formula that s = 4pi*r^2

As can be seen, as the surface area increases, s/4pi increases, and sqrt(s/4pi) will also increase, meaning that the radius will increase. This continues until the balloon reaches the maximum s = 1500 cm^2.

The correct answer is the first choice:
<span>As the surface area of the balloon increases, the radius of the balloon increases until the maximum surface area is reached.</span>
5 0
3 years ago
Read 2 more answers
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