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Scorpion4ik [409]
2 years ago
5

Consider this quadratic equation. x^2+2x+7=21 The number of positive solutions to this equation is ____. The approximate value o

f the greatest solution to the equation, rounded to the nearest hundredth, is ____

Mathematics
1 answer:
babunello [35]2 years ago
7 0

Answer:

Step-by-step explanation:

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The ratio of tom’s age to Mary’s is 3:4.If Tom is 15 how old is Mary
AnnZ [28]
Hey there!

Tom's age to Mary's is 3:4; an equivalent ratio is 15:x (x symbolizes Mary's age).

To solve for this, we need to divide our proportions. By that, I mean divide Tom's older age by his younger age. If we do so, we should get a scale factor that we can multiply Mary's younger age by.

15 / 3 = 5

This means that the scale factor of the ages is 5.

x / 4 = 5 (Solving for Mary's unknown age.)

To solve for x, multiply both sides by 4.

x/4 * 4 = x
5 * 4 = 20

x = 20

Mary's age is 20.

I hope this helps!
3 0
3 years ago
4.5, 3.25, 3.75, 3.25, 4.25, 3.5, 3.75, 4.25, 4.5, 2.5 <br><br> Whats the mean?
Alchen [17]

\frac{4.5 + 3.25 + 3.75 + 3.25 + 4.25 + 3.50 + 3.75 + 4.25 + 4.50 + 2.50}{10}  = 3.75
So; the answer is: 3.75
5 0
3 years ago
Jennifer got a box of chocolates. The box is a right triangular prism shaped box. It is 7 inches long, and the triangular base m
Dafna1 [17]
The surface area would be 68 squared inches. I hope this helps!
4 0
3 years ago
In the seahorse tank at an aquarium, 70% of the male seahorses
lara [203]

Part A: Kennedy's expression is incorrect because 0.07 is 7 percent, not 70.

Part B: The correct expression would be 0.7 * 20, which equals 14

3 0
2 years ago
Using the law of cosines, a=_ rounded to the nearest tenth.
Leya [2.2K]
A^2 = 4.0^2 + 3.7^3 - 2*4*3.7 cos 334

= 4.865

a =  2.2  to nearest tenth.
5 0
3 years ago
Read 2 more answers
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