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guapka [62]
4 years ago
5

Help please!!!! ;-; staph scrolling

Mathematics
1 answer:
sertanlavr [38]4 years ago
8 0

y = 4^x \quad \to\quad y = - \frac 2 3 (4^{x+7}) - 5

y=4^x

OK, we'll go in steps.  First a reflection through the x axis, which negates y.

y = -4^x

Now a vertical scaling of 2/3

y = -\frac 2 3 \cdot 4^x

Now we shift seven units to the right,

y = -\frac 2 3 \cdot 4^{x+7}

Now down five,

y = -\frac 2 3 \cdot 4^{x+7} - 5

There it is.

Answer: reflection thru x axis, vertical scale 2/3, right shift 7, down 5, second choice

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One warehouse had 185 tons of coal, another one had 237 tons. The first warehouse delivered 15 tons of coal to its clients daily
lianna [129]

Answer:

In 9 days will the second warehouse have 1.5 times more coal than the first one

Step-by-step explanation:

The coal left in warehouses after x days can be found using the equation:

  • first warehouse: 185 - 15x
  • second warehouse= 237-18x

Let the second warehouse have 1.5 times more coal than the first one after n days then  

  1. 1.5 ×(185 - 15n)=237-18n  which gives:
  2. 277,5-22,5n=237-18n and
  3. 40,5=4,5n
  4. 9=n

7 0
3 years ago
What is the answer to 5 x 2 x 2 + 2?
Sedbober [7]
It is 22 cuz 5 * 2 is 10 and 10 * 2 IS 20 + 2=22

7 0
4 years ago
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Which of the following is a characteristic of the circumcenter of a triangle? A. It is the center of the circle that can be insc
ki77a [65]
Answer is A. It is the center of the circle that can be inscribed in a given triangle
Explanation
The circumcenter is called ”the circumcenter” because it is the center of the circle that ”circumscribes” the triangle.
6 0
2 years ago
A projector enlarges an image in the ratio 20:1. What will be the size of an enlargement of a picture that is 8cm by 6cm?
nydimaria [60]

Answer:

160 cm × 120 cm

Step-by-step explanation:

this means 1 cm turns into 20 cm.

so, 8 cm × 6 cm becomes

8×20 = 160 cm × 6×20 = 120 cm

3 0
1 year ago
Can any help me please
PSYCHO15rus [73]
A = 8i + 6j
b = 4i + 5j

ab = (8i + 6j)(4i + 5j)
ab = 8i(4i + 5j) + 6j(4i + 5j)
ab = 8i(4i) + 8i(5j) + 6j(4i) + 6j(5j)
ab = 32i² + 40ij + 24ij + 30j²
ab = 32i² + 64ij + 30j²
ab = <32, 30>

The answer is D.
4 0
3 years ago
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