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VARVARA [1.3K]
2 years ago
7

Solve the system of equations x - 4y = 7 2x + y = 5 HTML EditorKeyboard Shortcuts

Mathematics
1 answer:
tekilochka [14]2 years ago
5 0
X-4y=7 Answer:1/4
2x+y=5

2x+y=5 I am not sure but I’m pretty sure the answer is -2
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The function h(x) = x2 + 4x − 11 represents a parabola.
Vitek1552 [10]
A.
 = (x + 2)^2 - 4 - 11
= (x + 2)^2 - 15

B.   vertex  is at ( -2, -15) which is a minimum because the coefficient of x^2 is positive.

C.   The axis of symmetry is a vertical line passing through the vertex It is 
x = -2.
6 0
3 years ago
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To make a specific hair dye, a hair stylist uses a ratio of 1 1/8 ounces of red tone, 3/4 ounces of gray tone, and 5/8 ounces of
natima [27]

Answer: To make 20 ounces of dye, we need 3 oz red tone, 6 oz of gray tone and 5 oz of brown tone.

To make 100 ounces of dye, we need 15 oz red tone, 30 oz of gray tone and 25 oz of brown tone.


Step-by-step explanation:

The amount of specific hair dye made by given ingredients=1\frac{1}{8}+\frac{3}{4}+\frac{5}{8}

=\frac{9}{8}+\frac{3}{4}+\frac{5}{8}

=\frac{9+6+5}{8}=\frac{20}{8}=\frac{5}{2}\ oz

Therefore , The amount of specific hair dye made by given ingredients=\frac{5}{2} qz

Multiply reciprocal of \frac{5}{2} to each ingredient to find the amount of each ingredient required to make 1 oz of specific hair dye.

To make 1 oz of specific dye, the amount of red tone needed=\frac{3}{8}\times\frac{2}{5}=\frac{3}{20}\ oz

Similarly, Gray tone=\frac{3}{4}\times\frac{2}{5}=\frac{3}{10}\ oz

Brown tone=\frac{5}{8}\times\frac{2}{5}=\frac{1}{4}\ oz

Now, multiply 20, to each

To make 20 oz of specific dye, the amount of red tone needed=\frac{3}{20}\times20=3\ oz

Similarly, Gray tone=\frac{3}{10}\times20=6\ oz

Brown tone=\frac{1}{4}\times20=5\ oz

To find each dye to make 100 ounces of dye, multiply 5 to the above amounts, [since 100=20\times5 ]

To make 20 oz of specific dye, the amount of red tone needed=15\ oz

Similarly, Gray tone=30\ oz

Brown tone=25\ oz


3 0
3 years ago
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An expert diver is looking for a particular species of fish along the coast line. He dives 30 feet below the surface of the ocea
Bumek [7]

Answer:

31

Step-by-step explanation:

Depth Changes:

1. down 25 feet

2. down 10 feet

3. up 7 feet

4. down 3 feet

4 0
3 years ago
What is the trapezoid enter your answer in the box 4,5,17,5
xenn [34]

Answer:

88unit^2

Step-by-step explanation:Area=

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Area=88unit^2

7 0
3 years ago
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It's due in 5 hours help
adell [148]

Answer:

Step-by-step explanation:

Things to remember:

1). When we divide a number having decimal by 10, 100, 1000 or any number multiple of ten, decimal point of the numerator shifts left by the number of zeros present in denominator.

Example:    \frac{2.0}{100}=0.02

2). When we multiply a decimal number by 10, 100, or any number number multiple of 10, decimal point of the original number shifts right by number of zeros present in multiplier.

Example:   2.0 × 100 = 200

In this question, 0.014 × 100000 = 1400.000

Therefore, product of 0.014 and 100000 is 1400 because the decimal point in 0.014 moves 5 places to the right.

8 0
3 years ago
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