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TiliK225 [7]
3 years ago
11

20 POINTS! WILL MARK BRAINLIEST--- ANSWER AND EXPLAIN!!! thank you!

Mathematics
1 answer:
stich3 [128]3 years ago
6 0

Answer:

B and the last one

Step-by-step explanation:

If you solve the last one you get 22=2r B is also 22=2r so they are the same

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satela [25.4K]

Answer:

4 < x < 14

Step-by-step explanation:

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3 0
3 years ago
Please help me with this.
JulijaS [17]

The <em>speed</em> intervals such that the mileage of the vehicle described is 20 miles per gallon or less are: v ∈ [10 mi/h, 20 mi/h] ∪ [50 mi/h, 75 mi/h]

<h3>How to determine the range of speed associate to desired gas mileages</h3>

In this question we have a <em>quadratic</em> function of the <em>gas</em> mileage (g), in miles per gallon, in terms of the <em>vehicle</em> speed (v), in miles per hour. Based on the information given in the statement we must solve for v the following <em>quadratic</em> function:

g = 10 + 0.7 · v - 0.01 · v²      (1)

An effective approach consists in using a <em>graphing</em> tool, in which a <em>horizontal</em> line (g = 20) is applied on the <em>maximum desired</em> mileage such that we can determine the <em>speed</em> intervals. The <em>speed</em> intervals such that the mileage of the vehicle is 20 miles per gallon or less are: v ∈ [10 mi/h, 20 mi/h] ∪ [50 mi/h, 75 mi/h].

To learn more on quadratic functions: brainly.com/question/5975436

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3 0
2 years ago
If sin =1/2then show that 3cos -4cos^3=0z
Katarina [22]

Step-by-step explanation:

ever coner should have a value.... for example sinA or cos$

please check the question again

7 0
3 years ago
What is negative 17 over 40 as a decimal?
STatiana [176]
The answer to the question :) 17/40=.425
8 0
3 years ago
The difference of twice a number and 3 is -21 translated
Westkost [7]

Answer:

2x-3=-21.

2x=-21+3.

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x=-18/2.

x= -9.

7 0
3 years ago
Read 2 more answers
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