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3 years ago

Find the value of a that makes the ordered pair a solution of the equation

Mathematics

1 answer:

alex41 [277]3 years ago

3 0

Answer:

a = 5

Step-by-step explanation:

assuming (a-1, 9) is in the form of (x,y):

9(a-1) - 5(9) = -9

9a - 9 - 45 = -9

9a = 45

a = 5

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A bag contain 6 red and 5 green identical balls.

Ann [662]

Answer:

3/11 for two red balls

2/11 for two green balls

Step-by-step explanation:

6 red and 5 green balls

first ball - red= 6/11, green= 5/11

second red ball- 5/10=1/2, second green ball- 4/10= 2/5

Two red balls = 6/11*1/2= 3/11

Two green balls= 5/11*2/5= 2/11

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3 years ago

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Isabel has ridden 16 miles of a bike course. The course is 80 miles long. What percentage of the course has Isabel ridden so far

OlgaM077 [116]

Answer:

20%

Step-by-step explanation:

Divide 16 by 80 and you get 0.2 as an answer and to get a percent you move the decimal 2 places to the right to fet 20%

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3 years ago

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PLEASE HELPPPPPP!!!!!!!!

Eduardwww [97]

Answer:

$\sf y=\dfrac{1}{3}x$

Step-by-step explanation:

First find the slope:

$\sf slope\:(m)=\dfrac{change\:in\:y}{change\:in\:x}=\dfrac{4-5}{12-15}=\dfrac{1}{3}$

Use the point-slope form of linear equation: $\sf y-y_1=m(x-x_1)$
(where m is the slope and (x₁, y₁) is a point on the line)

with the found slope and one of the points:

$\begin{aligned}\sf y-y_1 &=\sf m(x-x_1)\\\\\implies \sf y-4 &=\sf \dfrac{1}{3}(x-12)\\\\\sf y-4 &=\sf \dfrac{1}{3}x-4\\\\\sf y &= \sf \dfrac{1}{3}x\end{aligned}$

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2 years ago

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If f(x) = x2 – 1 and g(x) = 2x - 3, what is the domain of (fºg)(x)?

valentinak56 [21]

Answer:

Step-by-step explanation:

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3 years ago

Solve for x. Assume that lines which appear to be diameters are actual diameters.

enyata [817]

Answer:

x = 7

Step-by-step explanation:

$(4x + 2) \degree = 360 \degree - (85 + 40 + 75 + 130) \degree \\ \\ (4x + 2) \degree = 360 \degree - 330 \degree \\ \\ (4x + 2) \degree = 30 \degree \\ \\ 4x + 2 = 30 \\ \\ 4x = 30 - 2 \\ \\ 4x = 28 \\ \\ x = \frac{28}{4} \\ \\ x = 7$

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3 years ago