Answer:
tectonic plate movements
Step-by-step explanation:
Let's write that as an equation.
x-8=4x+7
So, you must solve for x by putting all of x on one side then solving for the value of one x.
x-8=4x+7
-8=3x+7
-15=3x
-5=x
Check your work.
(-5)-8=4(-5)+7
-13=-13
Answer:
72 doctors recommended the medicine
Step-by-step explanation:
The question above is interpreted thus.
9 out of 10 implies 9/10. If 80 doctors were surveyed, the number of doctors that recommended the medicine is 9/10 of 80 doctors. Therefore,





Therefore, in a survey where 9 out of 10 doctors recommended a certain medicine; and 80 doctors were surveyed, 72 doctors recommended the medicine.
Answer:
50 + 3x ≥ 100
Step-by-step explanation:
You already know that you are getting $50 that week. Then, for every sale you make $3. Your goal is $100, but you wouldn't complain about making more. Therefore, the inequality sign used here should be the greater than or equal to sign (≥). Your equation should be what is written above, with your payment on the left and earning goal on the right of the inequality sign.