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netineya [11]
3 years ago
8

The math test has 15 multiple choice questions, each with 3 answers. If Betty guesses correctly on the first 4 questions,

Mathematics
1 answer:
Sonbull [250]3 years ago
8 0

Answer:

90 percent

Step-by-step explanation:

15 divided by 4 so 3.75 i rounded it and i got 4

You might be interested in
F(x) = x2 + 2x-5<br> g(x) = -3/2 - 4x + 1<br> What is f(x) – g(x)?
NeX [460]

Step-by-step explanation:

Start by finding (fog)(x)

To find this function, substitute x=

x−1

4

That is g(x) into f(x)

⇒(f∘g)(x)=(

x−1

4

)

2

−2(

x−1

4

)+5

=

(x−1)

2

16

−

x−1

8

+5

Now substitute x=3

⇒(f∘g)(3)=

(3−1)

2

16

−

3−1

8

+5

=

4

16

−

2

8

+5=4−4+5=5.

Hope it helps:)

6 0
3 years ago
AYÚDENME!!!! T.T PORFA
Vitek1552 [10]

Answer:

Por el teorema de 30 grados en un triangulo rectangulo la linea roja es \sqrt{3} veces la longitud del cateto opuesto al angulo de de 30. Por tanto la linea roja será:

l=\sqrt{3}\times3\sqrt{3}=9

Luego

x=9-3=6

7 0
3 years ago
a falling stone is at a certain instant 230 feet above the ground. 3 seconds later it is only 14 feet above. From what height wa
vazorg [7]
The falling stone is a certain instant 230 feet above the ground. 3 seconds later it is only 14 feet above. The height that it was dropped is 32 feet. The equation for the answer is; 

<span>16<span>t2</span>+<span>h0</span>=230</span> <span>−16(t+3<span>)2</span>+<span>h0</span>=14</span>


4 0
3 years ago
Read 2 more answers
Choose all equations for which x=2 is a solution.
makvit [3.9K]
A and D that’s the answer
8 0
2 years ago
Brian needs to find the value of a number, a, so that when (x^2+3x) is added to the binomial (3x^2+ax), the sum simplifies to 4x
Julli [10]

Answer:

a = 9

Step-by-step explanation:

First we need to add  (x^2+3x)  to (3x^2+ax),

(x^2+3x)+(3x^2+ax)

Expand

= x^2+3x+3x^2+ax

Collect the like terms

= x^2+3x^2+3x+ax

= 4x^2 + 3x + ax

= 4x^2+(3+a)x

Equate the solution to 4x^2+12x

4x^2+(3+a)x = 4x^2+12x

Comparing the like terms on both sides

(3+a)x =12x

3 + a = 12

a = 12 - 3

a = 9

Hence the value of a is 9

6 0
2 years ago
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