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seraphim [82]
3 years ago
5

Tell whether the ratios form a proportion. 21:3 and 16:6​

Mathematics
1 answer:
lesya692 [45]3 years ago
4 0

Answer:

Step-by-step explanation:

21/3 = 16/6

126 ≠ 48

does not form a proportion

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If shoes are $20 each and the markup is 150%, how much will that cost?
MArishka [77]
<span>150% to decimal = 1.50 since 100% = 1 
</span><span>1.50 x 20 = 30
</span><span>30 + 20 = 50</span>
3 0
3 years ago
Explanation how solve step by step 2/7m-1/7=3/14
Drupady [299]

Answer:

m = 25/28

Step-by-step explanation:

It's best to enclose fractional coefficients inside parentheses to eliminate ambiquity:   2/7m-1/7=3/14 => (2/7(m - (1/7) = (3/14).

The LCD is 14; each of the denominators {7, 14} divides evenly into 14.  Hence our equation becomes

(4)(m - 1/7) = 3

... after multiplying every term by 14.

Let's multiply each side by 7 to eliminate the remaining fraction:

4(7m - 1) = 21, or

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Hence, m = 25/28.

8 0
4 years ago
Each lenght is in metres Calculate DC​
Gnom [1K]

Step-by-step explanation:

ED is greater than BC

the line from B to ED ^ (which i drew ) the point it touches ED name it X. so EX will be 2 ( ED-BC)(6-4).

then u have a triangle. EX, XB and EB.

you have length of EX(2) and u have hypotenuse. so u can calculate XB using Pythagoras theorem.

15.1²=2²+XB²

15.1²-2²=XB²

224.01=XB²

XB=14.97

since XB and DC are parallel ( a rectangle is forming XBCD) so DC is also 14.97

6 0
4 years ago
Which of the following expressions shows how to rewrite 4 - 5 using the addtive inverse and displays the expression correctly on
Evgesh-ka [11]

Answer: 4 - 5 = 4 + (-5) = -1

Step-by-step explanation:  You have to make the 5 into a negative number using parenthesis and do the math.

5 0
3 years ago
Read 2 more answers
30 POINTS FOR ANSWER!!<br> 2 numbers sum 120 and product 400<br> INSTANT ANSWER NEEDED
OLga [1]
I think the problem is
2X+20=400
You just have to answer I think X and X equals that two numbers I’m not 100% sure but I’m trying to help
4 0
3 years ago
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