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3 years ago

Evaluate the expression when x= -7.4 and y= -6.3-7y+2x

Mathematics

2 answers:

GenaCL600 [577]3 years ago

5 0

Answer: -29.3

Step-by-step explanation: -7y + 2x

-7(-6.3) + 2(-7.4) = -29.3

Nata [24]3 years ago

4 0

Answer:

$- 7y + 2x \\ - 7( - 6.3) + 2( - 7.4) \\ - 44.1 - 14.8 \\ - 18.91 \: \: \: \: \: \: \: .answer$

Step-by-step explanation:

hope it helps you

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2 years ago

A bag contain 5 red marbles,4 green marbles and 1 blue marble. A marble is chosen at random from the bag and not replaced; then

jarptica [38.1K]

Answer:

$\frac{2}{15}$

Step-by-step explanation:

GIVEN: A bag contain $5$ red marbles, $4$ green marbles and $1$ blue marble. A marble is chosen at random from the bag and not replaced, then a second marble is chose.

TO FIND: What is the probability both marbles are green.

SOLUTION:

Total marbles in bag $=10$

total number of green marbles $=4$

Probability that first marble will be green $P(A)=\frac{\text{total green marbles}}{\text{total marbles}}$

$=\frac{4}{10}=\frac{2}{5}$

Probability that second marble will be green $P(B)=\frac{\text{total green marble in bag}}{\text{total marble in bag}}$

$\frac{3}{9}=\frac{1}{3}$

As both events are disjoint

probability both marbles are green $=P(A)\times P(B)$

$=\frac{2}{5}\times\frac{1}{3}=\frac{2}{15}$

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3 years ago

If there are 9 girls and 11 boys in a class, what percentage of the class are girls

viva [34]

1. Find the total number of class members
9 + 11 = 20

2. Find 9 as a percentage of 20
9 / 20 = 0.45
0.45 x 100 = 45%

<u>45% of the class are girls.</u>

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Naya [18.7K]

To find the inverse, switch the x and y, and then solve for y (f(x) is the same as y)

So we get:
x=1.50y-30 (add 30 to both sides)
x+30=1.50y (divide both sides by 1.5)
x/1.5+30/1.5=y
y=x/1.5+20

Hope this helps

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3 years ago

Evaluate the expression when x= -7.4 and y= -6.3-7y+2x​

Evaluate the expression when x= -7.4 and y= -6.3-7y+2x