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2 years ago

B² - 5c if b = 15 and c = 9

Mathematics

2 answers:

bonufazy [111]2 years ago

4 0

Answer:

180

Step-by-step explanation:

Here,

b=15

c=9

Now,

$=b^{2}-5c\\\\=15^{2} -5*9\\\\=225-45\\\\=180$

stepan [7]2 years ago

3 0

Answer:

180

Step-by-step explanation:

b^2-5c

Substitute 15 in for b

15^2=225 -> 225-5c

Substitute 9 in for c

5(9)=45

225-45 = 180

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rodikova [14]

Answer:

$5\sqrt{7}$

Step-by-step explanation:

$\frac{30\sqrt{14} }{6\sqrt{2} }$

Cancel out 6 in both numerator and denominator.

$\frac{5\sqrt{14} }{\sqrt{2} }$ Rationalize the denominator of $\frac{5\sqrt{14} }{\sqrt{2} }$ by multiplying the numerator and denominator by $\sqrt{2}$ .

$\frac{5\sqrt{14}\sqrt{2} }{(\sqrt{2})^{2} }$

The square of $\sqrt{2}$ is 2

Factor 14=2 × 7. Rewrite the square root of the product $\sqrt{2x7}$ as the product of square roots $\sqrt{2}\sqrt{7}$ .

$\frac{5\sqrt{2}\sqrt{7}\sqrt{2} }{2}$

Multiply $\sqrt{2}$ and $\sqrt{2}$ to get 2.

$\frac{5x2\sqrt{7} }{2}$

Cancel out 2 and 2.

$5\sqrt{7}$

Hope it helps and have a great day! =D

7 0

2 years ago

Read 2 more answers

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nadya68 [22]

Answer:

Step-by-step explanation:

Circumference is= to diameter * Pi

$6\pi = 6*3.14=18.84\\15\pi=15*3.14=47.1$

For the ones that are radius, double it, then pi

$21*2\pi = 42\pi =42*3.14=131.88\\6.7*2\pi=13.4\pi =13.4*3.14=47.076$

6 0

3 years ago

WHICH ONE?? NEED HELP ASAP

Natali [406]

Answer:

Step-by-step explanation:

If you distribute the 2 you get 12.2x + 14 so D

4 0

2 years ago

Write a power represented with a positive base and a positive exponent whose value is less than the base

dlinn [17]

You have that situation with ANY base that's less than ' 1 '.

Examples:

(0.9)² = 0.81 (90% of the base)

(7/8)² = 0.765625 (87.5% of the base)

(1/2)² = 1/4 (50% of the base)

(0.1)² = 0.01 (10% of the base)

Each of these results is less than the base, and with
higher positive powers, they keep getting smaller.

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2 years ago

The expression 7z-9p+9z-z

nika2105 [10]

Answer:

15z - 9p

Step-by-step explanation:

7z - 9p + 9z - z

=7z - 9p +8z

= -9p + 15z or 15z - 9p Answer

Hope this helps!

4 0

3 years ago