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r-ruslan [8.4K]

3 years ago

9

Which ordered pair is a solution to the equation

1 answer:

miv72 [106K]3 years ago

4 0

B) Only (1, 3)

2x + 3y = 10

Substitute (2,2) into the equation:
2(2) + 3(2) = 10
4 + 6 = 10 which is true

Substitute (1,3) into the equation:
2(1) + 3(3) = 10
2 + 9 is not equal to 10

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Which expression is equal to (f + g) (x)?

allochka39001 [22]

Answer:

A

Step-by-step explanation:

(f+g)(x) means to do f(x)+g(x). We will add both functions together.

$f(x)+g(x)= (x^2+3)+(x-1)=x^2+x+2$

Answer a

7 0

3 years ago

Nancy buys 15 m of ribbon. Her sister buys 6 m less ribbon but pays twice as much per metre. Together they pay R66. What is the

Katarina [22]

Answer: 44/9 ----> 22/9

I hope this helps you

4 0

3 years ago

What’s the answer for this question?

Reil [10]

First, you would need to determine how much it would cost her if it was three for $1 or seven for 42.

Three for $1:
21 ÷ 3 = 7
7 × $1.00 = $7.00

Seven for $2:
21 ÷ 7 = 3
3 × $2.00 = $6.00

Now, all you would need to do is find the difference.
$7.00 - $6.00 = $1.00

Jackie would have saved A. $1.00.

I hope this helps!

7 0

3 years ago

What is the sum of the solutions of the equation 1.5x^2 - 2.5x -1.5 = 0? Round to the nearest hundredth.

BARSIC [14]

Answer:

$Sum = 1.67$

Step-by-step explanation:

Given:

$1.5x^2 - 2.5x -1.5 = 0$

Required

Determine the sum of the solutions

This question will be answered using quadratic formula:

$x = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}$

Where:

$a = 1.5$

$b = -2.5$

$c = -1.5$

So, we have:

$x = \frac{-(-2.5)\±\sqrt{(-2.5)^2 - 4*1.5*-1.5}}{2*1.5}$

$x = \frac{2.5\±\sqrt{6.25 +9}}{3}$

$x = \frac{2.5\±\sqrt{15.25}}{3}$

$x = \frac{2.5\±3.91}{3}$

$x = \frac{2.5+3.91}{3}$ or $x = \frac{2.5-3.91}{3}$

The sum of the solution is then calculated as:

$Sum = \frac{2.5+3.91}{3} + \frac{2.5-3.91}{3}$

Take L.C.M

$Sum = \frac{2.5+3.91+2.5-3.91}{3}$

$Sum = \frac{5}{3}$

$Sum = 1.67$

5 0

3 years ago

The students at a school assembly were divided into 4 equal groups. There were 63 students in each group. Write and solve an equ

yuradex [85]

$x \div 4 = 63 \\ \frac{1}{4} x = 63 \\ x = \frac{63}{ \frac{1}{4} } = 252$
hope this helps

4 0

4 years ago