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Nadusha1986 [10]
3 years ago
13

What is the value of 3ab+5b-6 when a=-1 and b=3? A.0 B.6 C.18 D.24

Mathematics
2 answers:
Otrada [13]3 years ago
5 0

Answer:

A. 0

Step-by-step explanation:

3ab+5b-6

= 3(-1)(3)+5(3)-6

=3(-3)+15-6

=-9+9

=0 ( you have to subtract because they don't have the same signs)

Mandarinka [93]3 years ago
3 0

use the substitution method

3ab+5b-6

3(-1)(3)+5(3)-6

Mutiply 3(-1)(3) first

3(-1)(3)= -3*3= -9

-9+5(3)-6

then mutiply

5(3)= 15

-9+15-6

= 6-6

= 0

Answer : A. 0

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C.288 yd2
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If 14 gallon of paint covers 1/12 of a wall, then how many quarts of paint are needed for the entire wall?
blondinia [14]

Answer:

4

Step-by-step explanation:

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Rebecca Wilson was the top scorer in a​ women's professional basketball league for the 2006 regular​ season, with a total of 846
RUDIKE [14]

Answer:

Number of two point goals = 169

Number of three point goals = 123

Number of free throws = 139

Step-by-step explanation:

Let the number of two point goals = x

Let the number of three point goals = y

Let the number of free throws = z

As per the given statements:

x = 2y-77 ...... (1)

z = x-30 ...... (2)

Using equation (1):

z = 2y-107 ...... (3)

Total number of points from two point goals  = 2x

Total number of points from three point goals  = 3y

Total number of points from free throws  = z

2x+3y+z=846

using (1) and (3):

2(2y-77)+3y+2y-107=846\\\Rightarrow 4y-154+5y-107=846\\\Rightarrow 9y-261=846\\\Rightarrow 9y=846+261\\\Rightarrow 9y=1107\\\Rightarrow y =123

By (1):

x = 2\times 123-77 =169

By (3):

z =2\times 123-107 = 139

So, answers are:

Number of two point goals = 169

Number of three point goals = 123

Number of free throws = 139

3 0
3 years ago
Please pe please please please please please help me
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Answer:

y =mx

Step-by-step explanation:

The second one is for the gradient

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6 0
2 years ago
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Setler [38]

Answer:

9,750 and 0.0000084

Step-by-step explanation:

9.75 × 10^3= 9,750 (move decimal 3 places to the right because exponent is positive)

8.4 × 10^-6 = 0.0000084 (move decimal 6 places to the left because exponent is negative)

3 0
3 years ago
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