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natka813 [3]
2 years ago
7

PLEASE HELPP!! DID I DO IT RIGHT???

Mathematics
1 answer:
astra-53 [7]2 years ago
8 0

Answer:

yea haha good job :-)

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Solve using the quadratic formula.<br> 7q² – 9q- 1=0
Mama L [17]

Answer:Q=1.39 or -0.103

Step-by-step explanation:

6 0
3 years ago
The radius of a sphere is 11 cm.what is the surface area of the sphere? Round to the nearest tenth.
Vanyuwa [196]

Answer:

The answer is

<h2>1520.5 cm²</h2>

Step-by-step explanation:

Surface area of a sphere is given by

S = 4πr²

where r is the radius

From the question r = 11cm

So the surface area of the sphere is

4π(11)²

= 4(121)π

= 484π

= 1520.5308

Which is

1520.5 cm² to the nearest tenth

Hope this helps you

8 0
3 years ago
What are the solutions of the inequality (x-3)(x+5)&lt;=0
GarryVolchara [31]

Assuming that the inequality you were going for was a ≤, set both polynomials less than or equal to 0.

x - 3 ≤ 0

x + 5 ≤ 0

For the first equation add 3 to both sides of the inequality. For the second, subtract 5 from both sides.

x ≤ 3

x ≤ - 5

These would be your solutions I guess, however, if you want to expand upon that, your actual answer is (- ∞, - 5] because if you were to plot these two inequalities on a number line, that is where the overlap would occur.

4 0
3 years ago
In the diagram below, which pair of angles is complementary?
Nataly_w [17]

Answer:

/2 and /4 because angle 1 is 90

7 0
2 years ago
In a 30% off sale, the price of an item is reduced by £27.
Serggg [28]

Answer: the original cost of the item is 90$

Step-by-step explanation:

30% off of the item = 27$

27 dollar is 30% of the item

thus 27 = 0.30X

0.30X = 27

time both side by 10

3X = 270

270/3 = 90

3 0
2 years ago
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