All categories

3 years ago

What is the value of 3 to the 2 power +5 times+25?

Mathematics

1 answer:

tester [92]3 years ago

7 0

Answer:

Step-by-step explanation:

3(3)^2 + 5(3) + 25

3*3 = 9, 5*3 = 15

3(9) + 15 + 25

27 + 15 + 25 = 67

You might be interested in

32 divided by 2(2^3 -4)

Irina18 [472]

First, you solve the exponent: 2(8-4)
—————
32
Do PEMDAS

2(4)
——
32

8
—
32

1
—
4

That’s your final answer :)

7 0

3 years ago

1. Triangle ABC has an angle of ABC = 60°, AB = 3 √3 cm and BC = 4 √3 cm. Determine the length of AC.

Oksi-84 [34.3K]

Answer:

see below

Step-by-step explanation:

you can use cosine law

(3 sqrt3)^2 + (4 sqrt3)^2 - 2(3 sqrt3)(4sqrt3)cos60 = AC^2

AC = sqrt39

4 0

2 years ago

Evaluate and simplify sin (-15º).

olga55 [171]

Note:

sin(-θ) = -sinθ

sin(-15°) = -sin15° Use a calculator

sin(-15°) = -sin15° = -0.2588

sin(-15°) = -0.2588

7 0

3 years ago

7. A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The T

Anit [1.1K]

Answer:

Modification has not reduced the number of accidents.

Step-by-step explanation:

$H_0: \mu\geq0\\H_a:\mu$

A B C D E F G H

Before modification 5 7 6 4 8 9 8 10

After modification 3 7 7 0 4 6 8 2

Difference -2 0 1 -4 -4 -3 0 -8

Mean of differences $M_d = \frac{sum}{8}=\frac{2+0-1+4+4+3-0+8}{8}=2.5$

Standard deviation of differences = $\sqrt{\frac{\sum(x-\bar{x})^2}{n}}=2.9277$

Formula of paired t test :

$t=\frac{M_d}{\frac{s}{\sqrt{n}}}\\t=\frac{2.5}{\frac{2.9277}{\sqrt{8}}}\\t = 2.4152$

Df = n-1 = 8-1 =7

$t critical = t_{(df, \alpha)}=t_{7,0.01}=2.998$

t critical> t calculated

So, We failed to reject null hypothesis

Hence modification has not reduced the number of accidents.

6 0

3 years ago

What is the volume of this shape?

Sergeeva-Olga [200]

Answer is second option 75cubic cm

5 0

3 years ago