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DiKsa [7]
3 years ago
15

Write this into a equation

Mathematics
1 answer:
solniwko [45]3 years ago
4 0
Let the number be 'x'.

Three times a number will then give 3x
Therefore the equation will be:
3x - 4 = 5
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Find the point at which the line joining the two points (-3,-5) and (7,5) cuts they y axis
8090 [49]

Answer:

(0,-2)

Step-by-step explanation:

First we find the equation of the line passes through (-3,-5) and (7,5).

The slope of the line is

m=\frac{5-(-5)}{7-(-3)}\\=\frac{10}{10}\\=1

So by the point slope formula the equation of the line is

y-5=1(x-7)\\y=x-7+5\\y=x-2

When x=0 we have y=0-2=-2.

Therefore the line joining the two points cuts the y-axis at (0,-2).

4 0
2 years ago
A parent increases a child’s monthly allowance by 20% each year. If the allowance is $8 per month now, in about how many years w
Mazyrski [523]

6 years

A parent increases a child’s monthly allowance by 20% each year. If the allowance is $8 per month now. This is an exponential function, An exponential function is given by:

Let x be the number of years and y be the allowance. The initial allowance is $8, this means at x = 0, y = 8

Since it increases by 20% each year, i.e 100% + 20% = 1 + 0.2 = 1.2. This means that b = 1.2
Therefore:

To find the number of years will it take to reach $20 per month, we substitute y = 20 and find x

x = 6 years to the nearest year
8 0
3 years ago
Find the probability that<br> x &lt;= -3
Slav-nsk [51]

Answer:

30%

Step-by-step explanation:

there are two numbers that fit in the x<=3 category, those being -3 and -5, so you add the two decimals for them (.17 and .13) to get .30 and move the decimal two times to the right to make it in percentage form.

6 0
2 years ago
Please help ASAP!!!!!!!!!!!!!!!!!!!!!!!!!
marin [14]
A. F(x)= log(x-2)+3 its answer A, I graphed it on a graphing calculator
5 0
3 years ago
Read 2 more answers
Sandra is making a large delivery in an apartment building. The maximum weight that the building's elevator can support is 3,200
vovangra [49]
She can ride up with 59 boxes.

Step 1. Subtract Sandra’s weight from the maximum weight. 3,200-145=3,055

Step two. Divide the weight of the boxes by 3,055. 3,055/51=59.9019608

Since she can’t carry .9 of a box, and 60 boxes would be over the maximum weight capacity, Sandra can only ride up with 59 boxes in the elevator.
4 0
2 years ago
Read 2 more answers
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