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White raven [17]
3 years ago
13

X/3.5=-2.4 help me please its 20 points

Mathematics
1 answer:
Harrizon [31]3 years ago
8 0

Answer: What is the question

Step-by-step explanation:

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On a scale drawing a school is 1.6 tall the scale factor is 1/22 find the height of the school
Lady bird [3.3K]
<span>In this problem,think of it this way. 1 is to 22 as 1.6 is to X.

When you solve for X you will have the height of your school

all you need to do is multiply 1.6 by 22 and you've got it!

Cheers!</span>
3 0
3 years ago
a rectangle is 8cm longer then it is wide, and it’s area is 153cm^2. Find the dimensions of the rectangle.
Stolb23 [73]

Answer:

Width of 9cm and length of 17cm.

Step-by-step explanation:

To calculate an area of a rectangle, use the formula A=l*w. We know the length is 8cm longer than the width. So l = 8 + w. So the area is A= (8+w)*w.

We also know the area is 153. Substitute this value for A and solve.

153 = (8+w)(w)\\153 = 8w+w^2\\w^2+8w-153 = 0

To solve the quadratic, use the quadratic formula:

\frac{-b+/-\sqrt{b^2-4ac} }{2a}

Here a=1, b=8 and c=-153.

w=\frac{-b+/-\sqrt{b^2-4ac} }{2a} \\w=\frac{-8+/-\sqrt{8^2-4(1)(-153)} }{2(1)} \\w=\frac{-8+/-\sqrt{64+612} }{2} \\w=\frac{-8+/-\sqrt{676} }{2} \\w=\frac{-8+/-26 }{2} \\w=\frac{-8+26 }{2}=\frac{18}{2}=9 \\and\\w=\frac{-8-26 }{2} =\frac{-34}{2}=-17

Since w=9 or w=-17, substitute this value for w in l= 8+w to find l.

l = 8+9 = 17

or

l=8+-17 = -9

Since length cannot be positive, it must be l=17 and w=9.

8 0
3 years ago
A pre-paid cell phone plan has a flat rate of $15 with an additional cost of $0.15 per
Tresset [83]

Answer:

anything less than 133 would be true

Step-by-step explanation:

35 ≥ 0.15m + 15

solve for m

subtract 15 from both sides

20  ≥ 0.15m

divide both sides by 0.15

133.33  ≥ m

m cannot be more than 133 minutes

5 0
2 years ago
Jason used the commutative property to write an expression that is equivalent to 3 4 + 5.6b + 9. 3 4 + 5.6b + 9 is equivalent to
vova2212 [387]

Answer:

Yes, Jason's work is correct.

Step-by-step explanation:

When you use the commutative property, you can swap the numbers position and still get the same answer.

Hope this helps!!

8 0
3 years ago
Read 2 more answers
3(9-4) Divided by five
wel

The answer you are looking for is 3.

To find this, you must first distribute the 3 into the parenthesis. 3 x 9 = 27 and 3 x 4 = 12.

Next, you subtract 12 from 27. 27 - 12 = 15.

Finally, divide 15 by 5 to get your final answer as 3.

I hope this helps!

3 0
3 years ago
Read 2 more answers
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