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yulyashka [42]
3 years ago
10

Expand the expression 7 (9x-2)

Mathematics
2 answers:
Marat540 [252]3 years ago
8 0
Use the distributiver property which says
a(b+c)=ab+ac
so
7(9x-2)=
(7 times 9x)+(7 times -2)=
(63x)+(-14)=
63x-14
          
Masteriza [31]3 years ago
7 0
If you would like to expand the expression 7 * (9 * x - 2), you can do this using the following steps:

7 * (9 * x - 2) = 7 * 9 * x - 7 * 2 = 63 * x - 14

The correct result would be 63 * x - 14.
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A student can run 100 yards in 15 seconds. Convert this speed to miles per hour.
nydimaria [60]
Answer:
6.67 miles per hour

6 0
3 years ago
What is the distance across the river in feet?
mario62 [17]

Answer:

375 ft

Step-by-step explanation:

Since the triangles are similar then the ratios of corresponding sides are equal, that is

\frac{d}{125} = \frac{30}{10} ( cross- multiply )

10d = 3750 ( divide both sides by 10 )

d = 375 ft

4 0
3 years ago
Please help on 9. Begging
Ira Lisetskai [31]
Compound Interest Formula:
A = P(1 + r/n)^(nt)

A= Accumulated amount with interest P= principal= $1000
R= annual interest rate (decimal)= 0.05
N= # times compounded per year= 12
T= # of years= 10

A= 1000(1 + 0.05/12)^(12*10)
divide inside parentheses first

A= 1000(1 + 0.0041666667)^ (12*10)
add inside parentheses

A= 1000(1.0041666667)^ (12*10)
multiply exponents

A= 1000(1.0041666667)^120
multiply parentheses by exponents

A= 1000(1.6470095043)
multiply last two numbers

A= $1,647.01 amount after 10 years

ANSWER:
D) $1647.01 total after 10 years

Hope this helps! :)
7 0
3 years ago
What is the slope-intercept form of the function described by this table
-BARSIC- [3]

Answer:

y = - 3x + 4

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (1, 1) and (x₂, y₂ ) = (3, - 5) ← 2 ordered pairs from table

m = \frac{-5-1}{3-1} = \frac{-6}{2} = - 3, thus

y = - 3x + c ← is the partial equation

To find c use any ordered pair from the table

Using (3, - 5 ), then

- 5 = - 9 + c ⇒ c = - 5 + 9 = 4

y = - 3x + 4 ← equation of line

6 0
3 years ago
Algebraically solve the following system of equations. Show all of your work.
fiasKO [112]

Answer:

x=−5/2 y+ 3/2

Step-by-step explanation:

Let's solve for x.

2x+5y=3

Step 1: Add -5y to both sides.

2x+5y+−5y=3+−5y

2x=−5y+3

Step 2: Divide both sides by 2.

2x/2

=

−5y+3

2x=

−5y+ 3/2

Answer:

x=−5/2 y+ 3/2

5 0
3 years ago
Read 2 more answers
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