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grigory [225]
2 years ago
11

Can someone help me with these 2 questions please 100% correct only

Mathematics
1 answer:
marin [14]2 years ago
5 0

The first one is h+(h+2.5)=22

The second one is w(w+8)=48


not sure about the second one but the first one I am 100% sure about.

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If a storm window has an area of 448 square inches, what are the dimensions if the window is 12 inches higher than it is wide (w
Sholpan [36]
16*28=448
28 is 12 inches higher than 16 so it should work.
5 0
3 years ago
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What are the roots of x in -10x2 + 12x − 9 = 0?
hoa [83]

Answer:

x_1=\frac{3(2+i\sqrt{6})}{10}

x_2=\frac{3(2-i\sqrt{6})}{10}

Step-by-step explanation:

Use the Quadratic formula:

x=\frac{-b\±\sqrt{b^2-4ac}}{2a}

You can identify that, in this case:

a=-10\\b=12\\c=-9

Now you need to substitute these values into the formula:

x=\frac{-12\±\sqrt{12^2-4(-10)(-9)}}{2(-10)}

x=\frac{-12\±\sqrt{-216}}{-20}

Remember that:

i=\sqrt{-1}

Therefore,rewriting and simplifying, you get:

x=\frac{-12\±6i\sqrt{6}}{-20}

x=\frac{-6(2\±i\sqrt{6})}{-2(10)}

x=\frac{3(2\±i\sqrt{6})}{10}

Then, you get the following roots:

x_1=\frac{3(2+i\sqrt{6})}{10}

x_2=\frac{3(2-i\sqrt{6})}{10}

6 0
2 years ago
Read 2 more answers
The ratio of dog and cat owners is 5 to 6. If there are 36 cat owners, what is the number of dog owners?
Vlad [161]

Answer:

30

Step-by-step explanation:


5 0
3 years ago
What's the ratio 48:30
Vladimir79 [104]
24:15 would be the simplified version, if that's what you meant.
7 0
3 years ago
Find the 75th term of the arithmetic sequence -1, 15, 31, ...−1,15,31,...
Readme [11.4K]

Answer:

1183

Step-by-step explanation:

Common difference:

d = 31 - 15 = 16

nth term:

a_n = a_1 + (n - 1)d

Here, a_1 = -1

a_{75} = -1 + (75 - 1)(16)

a_{75} = 1183

3 0
2 years ago
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