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Rasek [7]
3 years ago
13

Please help im confused\

Mathematics
1 answer:
Bad White [126]3 years ago
8 0

The slope-point form: y - y₁ = m(x - x₁).

The slope-intercept form: y = mx + b.

k:y=m_1x+b_1,\ l:y=m_2x+b_2\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}

We have:

k:y-3=-4(x+2)\to m_1=-4 and the point (-5, 7)

therefore m_2=-\dfrac{1}{-4}=\dfrac{1}{4}

y-7=\dfrac{1}{4}(x-(-5))\\\\\boxed{y-7=\dfrac{1}{4}(x+5)}\to\boxed{B.}

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X ÷ 4 - 9 = -3<br> What is X?
Ostrovityanka [42]

Answer:

x = 24

Step-by-step explanation:

Step 1:

x/4 - 9 = - 3      Equation

Step 2:

1/4x - 9 = - 3       Turn x/4 into 1/4x

Step 3:

1/4x = 6       Add 9 on both sides

Answer:

x = 24

Hope This Helps :)

4 0
3 years ago
A pole that is 3m tall casts a shadow that is 1.22m long. At the same time, a nearby building casts a shadow that is 38.5m long.
vichka [17]
Refer to the diagram shown below.

The height of the pole is CD (3 m), and its shadow is AB (1.22 m).
The height of the building is h m, and its shadow is AD (38.5 m).

The two triangles ΔABC and ΔADE are similar because of AAA.
Therefore
\frac{DE}{BC} = \frac{AD}{AB} \\\\  \frac{h}{3} = \frac{38.5}{1.22}

Cross multiply.
1.22 h = 3*38.5 = 115.5
h = 115.5/1.22 = 140.91 m

Answer: 141 m (nearest meter)

5 0
4 years ago
Read 2 more answers
How do you find 15% of a number
Mumz [18]
When you multiply a number by a percentage, you first convert the percent into a decimal.

You do this by moving the decimal point two places to the left and making the decimal point into % sign.

15% = 0.15

Then you multiply the decimal by the number you want to find the percentage of.

So, the answer to this question is <span>A. multiple the number by 0.15</span>
3 0
3 years ago
Percy solved the equation x2 + 7x + 12 = 12. His work is shown below. Is Percy correct? Explain.
Furkat [3]

Answer:

Percy is incorrect

Step-by-step explanation:

I plugged in 9 and 8 for x and both of them did NOT solve it. The only number I know of that can solve it is -7.       -7^2=49

                                             -7 multiplied by 7 =-49

                                                      (49) + (-49) + 12 = 12

4 0
3 years ago
Read 2 more answers
Write and inequality for the following statement: c is less than 6
Talja [164]

In order to solve this exercise you need to remember the following symbols in Inequalities:

1. The meaning of this symbol is "Greater than":

>

2. The meaning of this one is "Less than":

3. The following symbol means "Less than or equal to":

\le

4. And this one means "Greater than or equal to":

\ge

Knowing the above, you can determine that the statement "c is less than 6", can be written as the following inequality:

c

The answer is:

c

7 0
1 year ago
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