3 years ago

Evaluate the expression: 3c - 6d where c = 7 and d = -4

Mathematics

1 answer:

enyata [817]3 years ago

5 0

Answer:

Step-by-step explanation:

(3)(7)−(6)(−4)

=21−(6)(−4)

=21−(−24)

=45

You might be interested in

Samuel bakes cakes and earns $5 profit from each cake. This week, he made 25 cakes. One cake was so beautiful, that the customer

Anna35 [415]

Answer:

$150.00

Step-by-step explanation:

$5 times 25 cakes = $125.00 plus the extra $25.00 in tips = $150.00

Hope this helped you :)

4 0

4 years ago

Ana and chuyen are exploring underground caves anas location is -30 feet below the cave entrance and chuyen's patience is -12 fe

ki77a [65]

Ana' location is further away from the entrance

3 0

3 years ago

Triangle S R Q is shown. Angle S R Q is a right angle. An altitude is drawn from point R to point T on side S Q to form a right

Jet001 [13]

Answer:

Option B.

Step-by-step explanation:

It is given that ΔSRQ is a right angle triangle, ∠SRQ is right angle.

RT is altitude on side SQ, ST=9, TQ=16 and SR=x.

In ΔSRQ and ΔSTR,

$m\angle S=m\angle S$ (Reflexive property)

$m\angle R=m\angle T$ (Right angle)

By AA property of similarity,

$\triangle SRQ\sim \triangle STR$

Corresponding parts of similar triangles are proportional.

$\dfrac{SR}{SQ}=\dfrac{ST}{SR}$

Substitute the given values.

$\dfrac{x}{9+16}=\dfrac{9}{x}$

$\dfrac{x}{25}=\dfrac{9}{x}$

On cross multiplication we get

$x^2=25\times 9$

$x^2=225$

Taking square root on both sides.

$x=\sqrt{225}$

$x=15$

The value of x is 15. Therefore, the correct option is B.

7 0

4 years ago

Read 2 more answers

What is the product written in scientific notation? (1.4 × 103)(2.5 × 10–6) A. 3.9 × 10–3 B. 3.9 × 10–18 C. 3.5 × 10–3 D. 3.5 ×

schepotkina [342]

Hi

1.4 × 10³ × 2.5 × 10⁻⁶ = 1.4 × 2.5 × 10³ × 10⁻⁶ = 3.5 × 10⁻³

1.4 × 2.5 = 3.5

10³ × 10⁻⁶ = 10³⁻⁶ = 10⁻³

Answer: C) 3.5 × 10⁻³

4 0

3 years ago

Read 2 more answers

How to match an equation with its graph

agasfer [191]

Is it y=mx+b?

To match an equation with it, use Rise over Run. If the b is 5, in the graph, the line passes 5 on the y-axis.

6 0

3 years ago

Read 2 more answers