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3 years ago

13

Help guys please I'll give 30 points

1 answer:

dusya [7]3 years ago

3 0

Are you comfused on all of them or a specific one

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Find the point 3x - 7x₂ =5. of the lines x, - 5x2 = 1 and of intersection

tia_tia [17]

Answer:

( $\frac{9}{4},\frac{1}{4})$

Step-by-step explanation:

We are given that two lines

$x_1-7x_2=5$ and $x_1-5x_2=1$

We have to find the intersection point of two lines

Let $3x_1-7x_2=5$ (equation 1)

$x_1-5x_2=1$ (Equation 2)

Multiply equation 2 by 3 then subtract from equation 1

$-7x_2+15x_2=5-3$

$8x_2=2$

$x_2=\frac{2}{8}=\frac{1}{4}$

Substitute $x_2=\frac{1}{4}$ in the equation 1

Then, we get

$3x_1-7\frac{1}{4}=5$

$3x_1-\frac{7}{4}=5$

$3x_1=5+\frac{7}{4}=\frac{20+7}{4}=\frac{27}{4}$

$x_1=\frac{27}{4\times 3}=\frac{9}{4}$

Hence, the intersection point of two given lines is ( $\frac{9}{4},\frac{1}{4})$

6 0

3 years ago

A group of neighbors is holding an end of summer block party. They buy p packs of hot dogs, with 8 hot dogs in each pack. All to

lana66690 [7]

Since each pack has 8 hot dogs and have 56 in total you use the equation p(8)=56 and just divide by 8 getting 7. They bought 7 packs of hot dogs.

8 0

4 years ago

Read 2 more answers

Can someone help please. I need help asap.

VikaD [51]

11. 1506.5
12. 3.2inches on the map

7 0

4 years ago

Help me on this please

dusya [7]

Answer:

1. $2 / 5$ - Fractional form, $0.4$ - Decimal Form

2. $5 / 8$ - Fractional form, $0.625$ - Decimal Form

3. $6 / 7$ - Fractional form, $0.8571$ - Decimal Form

4. $\sqrt{a / b}$

5. $\sqrt{a * b}$

Step-by-step explanation:

1. $\sqrt{4 / 25}$

Steps:

1. Divide - $4 / 25$

2. Then take the square root of what you got - $\sqrt{0.16}$ = $0.4$

2. $\sqrt{25 / 64}$

Steps:

1. Divide - $25 / 64$

2. Then take the square root of what you got - $5 / 8$

3. $\sqrt{36 / 49}$

Steps:

1. Take the square root of the top number - 6

2. Tage the square root of the bottom number - 7

3. Answer is 6/7.

4. $\sqrt{a} / \sqrt{b}$ = $\sqrt{a / b}$

5. $\sqrt{a} * \sqrt{b}$ = $\sqrt{a * b}$

<em><u>Formula:</u></em>

$\sqrt{a} / \sqrt{b}$ = $\sqrt{a / b}$

$\sqrt{a} * \sqrt{b}$ = $\sqrt{a * b}$

5 0

3 years ago

Select the choice that translates the following verbal phrase correctly to algebra:

nika2105 [10]

Answer:

The equation should be 8(x+3)

7 0

3 years ago