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3 years ago

Select all ratios equivalent to 7:2 ?

Mathematics

1 answer:

ycow [4]3 years ago

6 0

Answer: 14:4 , 21:6 , 28:8 , 35:10

Step-by-step explanation:

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I need help if anyone knows the answer please ASAP

mina [271]

Answer:

TE=11

Step-by-step explanation:

$x^2+6x=x+14\\x^2+6x-x-14=0\\x^2+5x-14=0\\(x-2)(x+7)=0\\x=2\\x=-7\\$

(you can't use -7 cuz that would make TE a negative distance and that's a nono)

$x=2\\TE=6(2)-1\\=12-1\\=11$

6 0

3 years ago

Determine the solution of the equation 4y - 5= 7.<br> A) 4<br> B) 3<br> C)

puteri [66]

Answer:

B) 3

Step-by-step explanation:

add 5 to both sides, 4x=12

divide both sides by 4, x=3

6 0

3 years ago

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What is 12+ 12-4 %2<br> Hhhhhhhhhhhhhhhhhhhhhhhhhhh

prohojiy [21]

Can you show me a picture of the problem?

6 0

3 years ago

A lamp was on sale for 25% off its regular price of $80. Craig had a coupon that took an additional 25%

hram777 [196]

Answer:

$45

Step-by-step explanation:

The sale price changed from $80 to 60, then with the coupon another 25% was taken off leading it to come to a price of $45

$80 x .75 = 60

$60 x .75 = 45

(.75 is for the price of the original value that he will be paying later)

6 0

3 years ago

The waiting time to ride a roller coaster is 20 minutes when 150 people are in line. How long is the waiting time when 240 peopl

laiz [17]

Answer: The waiting time will be 32 minutes when 240 people in line.

Step-by-step explanation:

Let us assume that the waiting time is directly proportional to the number of people in the queue.

Equation of direct proportion between variables x and y : $\dfrac{x_1}{y_1}=\dfrac{x_2}{y_2}$

Put $x_1=20,\ y_1=150,\ y_2=150$ to find $x_2$ .

$\dfrac{20}{150}=\dfrac{x_2}{240}\\\\\Rightarrow\ x_2=\dfrac{20}{150}\times240\\\\\Rightarrow\ x_2=32$

Hence, the waiting time will be 32 minutes when 240 people in line.

3 0

3 years ago

Read 2 more answers