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3 years ago

Write an algebraic expression for the given statement Add 9z to the product of 3x and 7y

Mathematics

1 answer:

mixas84 [53]3 years ago

3 0

Answer:

3x × 7y + 9z

Step-by-step explanation:

No explanation

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If 45 cookies will serve 15 students,how many cookies are needed for 30 students?

blondinia [14]

Simply multiply 45 by 2 and you get your answer which is 90 cookies

3 0

3 years ago

Solve for x: two thirds(x − 2) = 4x.

Sveta_85 [38]

Answer:

$x = - 0.4$

Step-by-step explanation:

$\frac{2}{3} (x - 2) = 4x$

Expand with the distributive rule:

$\frac{2}{3} x - \frac{2}{3} \times 2 = 4x$

$\frac{2}{3} x - \frac{4}{3} = 4x$

Add 4/3 to both sides:

$\frac{2}{3} x = 4x + \frac{4}{3}$

Subtract 4x from both sides

$- \frac{10}{3} x = \frac{4}{3}$

$- 10x = 4$

$x = - 0.4$

5 0

3 years ago

What value of c makes the trinomial below a perfect square x2 + 7x + c?

Daniel [21]

We have that
x² + 7x + c
Group terms that contain the same variable
(x² + 7x )+ c
Complete the square. Remember to balance the equation
(x² + 7x+3.5² )+ c-3.5²

Rewrite as perfect squares

(x+3.5)²+ c-3.5²
so
c-3.5² must be zero
c-3.5²=0------- c=3.5²------> c=12.25

the answer is
the value of c must be 12.25

5 0

3 years ago

Read 2 more answers

5. Is the data point, P, an outlier, an influential point, both, or neither?

atroni [7]

Answer:

outlier

Step-by-step explanation:

it is way to far away to be any of those other options. that means it is an outlier.

7 0

3 years ago

The Long family and the Harris family each used their sprinklers last summer. The water output rate for the Long family's sprink

horrorfan [7]

Answer:

Step-by-step explanation:

Given

Rate of Long family's sprinkler is 25 L/hr

rate of Harris family's sprinkler is 35 L/hr

Total time for which sprinkler is used =55 hr

Let long family run their sprinkler for x hr

therefore Harris family time=55-x

Total volume collected=1625 L

thus

$25\times x+35\times (55-x)=1625$

25x+1925-35x=1625

1925-1625=10x

300=10x

x=30 hr

long family used for 30 hr and Harris family used for 20 hr

4 0

3 years ago