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3 years ago

What number is five more than the product of six and seven write an expression

1 answer:

8 0

Let us say that this number is n

is means equal sign
product means multiplication
more than means addition
so

$n = 5 + 6 \times 7$

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Quadratic functions question! 7 pts!

Sedbober [7]

Answer:

Step-by-step explanation:

6,2

2,6

a is your answer

6 0

3 years ago

I need help with this question??

Alex787 [66]

Answer:

2d + 8

Step-by-step explanation:

twice the number d = 2 × d = 2d and 8 more means add on 8, that is

2d + 8 ← is the variable expression

4 0

4 years ago

Read 2 more answers

A post office charges 50k for a telegram of 15 words or less it charges an extra 3k for every word above 15 words find the cost

Jlenok [28]

Answer:

95k

Step-by-step explanation:

Given :

15 words or less = 50k

Every word above 15 = additional 3k

The cost of 30 words :

First 15 words = 50 k

Number of additional words = (30 - 15) = 15 words

Cost of every additional word = 3 k

Cost of 15 additional word = 15 * 3 = 45k

Total cost of 30 words :

50k + 45k = 95k

5 0

3 years ago

If f(x) = 3x2 − 8x, 0 ≤ x ≤ 3, evaluate the Riemann sum with n = 6, taking the sample points to be right endpoints.

denis23 [38]

Split up the interval [0, 3] into 6 subintervals,

[0, 1/2], [1/2, 1], [1, 3/2], [3/2, 2], [2, 5/2], [5/2, 3]

The right endpoints are given by the arithmetic sequence,

$r_i=0+\dfrac i2=\dfrac i2$

with $1\le i\le6$ .

We approximate the integral of $f(x)$ on the interval [0, 3] by the Riemann sum,

$\displaystyle\int_0^3f(x)\,\mathrm dx=\sum_{i=1}^6f(r_i)\Delta x_i$

$\displaystyle=\frac{3-0}6\sum_{i=1}^6\left(3{r_i}^2-8r_i\right)$

$\displaystyle=\frac12\sum_{i=1}^6\left(\frac{3i^2}4-4i\right)$

$\displaystyle=\frac38\sum_{i=1}^6i^2-2\sum_{i=1}^6i$

Recall the formulas,

$\displaystyle\sum_{i=1}^ni=\frac{n(n+1)}2$

$\displaystyle\sum_{i=1}^ni^2=\frac{n(n+1)(2n+1)}6$

Then the value of the integral is approximately

$\displaystyle=\frac38\cdot\frac{6\cdot7\cdot13}6-2\cdot\frac{6\cdot7}2=\boxed{-\frac{63}8}=-7.875$

Compare to the exact value of the integral, -9.

7 0

3 years ago

Examine the diagram, where BD¯¯¯¯¯¯¯¯

Sidana [21]

The value of x based on the tangent-secant theorem is: 19.

Recall:

The secant-tangent theorem states that when a tangent and a secant meet outside a circle, the product of the secant length and it's segment outside the circle is equal to the square of the tangent segment length.

Applying the tangent-secant theorem or rule, we will have this equation:

$AB \times EB= DB^{2}$

AB = $(x-7)+4 = x -3$

EB = 4

Substitute:

$(x - 3)(4) = 8^{2} \\\\4x - 12 = 64\\\\$

Add 12 to both sides

$4x = 64 +12\\\\4x = 76$

Divide both sides by 4

x = 19

Therefore the value of x is 19.

Learn more here:

brainly.com/question/9330100

4 0

3 years ago