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kow [346]
2 years ago
13

Help asap pleaseeeee!!!

Mathematics
1 answer:
Sophie [7]2 years ago
7 0

Answer:

D I think

Step-by-step explanation:

Angle B is equal to Angle E

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Sarah used her calculator to work out the value of a number y .
mars1129 [50]

Answer:

7.75 \: \leqslant y \:  <  \: 7.85

Step-by-step explanation:

The calculator approximated the value of y at 7.8.

We need to complete the error interval for y.

In other words, we calculate the upper and lower bound for y.

The level level of accuracy is to the nearest tenth.

To find the lower bound, we subtract half the degree of accuracy to get:

y \geqslant 7.8 - 0.05  \\ y  \geqslant 7.75

To find the upper bound, add half the level of accuracy to get:

y \:  <  \: 7.8 + 0.05 \\ y \:  <  \: 7.85

Therefore the error interval is

7.75 \: \leqslant y \:  <  \: 7.85

5 0
2 years ago
The accompanying data resulted from an experiment in which weld diameter x and shear strength y (in pounds) were determined for
saul85 [17]

Answer:

y hat = 2114.20 + 18.96x

Step-by-step explanation:

Given the least square regression model equation:

y hat = -959.00 + 8.60x

weld diameter x ; shear strength y (in pounds)

1 lb = 0.4536 kg

To express shear strength y in kilogram:

y is multiplied by 0.4536

(y hat × 0.4536) = -959.00 + 8.60x

Divide both sides by 0.4536

(y hat × 0.4536) / 0.4536= (-959.00 + 8.60x) / 0.4536

y hat = 2114.1975 + 18.959435x

y hat = 2114.20 + 18.96x

7 0
2 years ago
Simplify . 4y4 4y8 8y4 8y8
Tanya [424]

Answer:

B

Step-by-step explanation:

Just did it.

4 0
3 years ago
Find the zeros of the function.
Rudik [331]

Answer:

Lesser x = -9

Greater x = 9

Step-by-step explanation:

5 0
2 years ago
Write the quadratic equation whose roots are 1 and -5, and whose leading coefficient is 3.
Anna35 [415]

Step-by-step explanation:

they're is a neat little trick.

but first of all, "roots" means the 0 solutions of the equation. like

ax² + bx + c = 0

there are 2 solutions for x to make the whole expression equal 0.

these are the "roots".

now to the little trick :

when is a multiplication resulting in 0 ?

when at least one of the factors is 0.

and any quadratic expression can be written as multiplication of 2 factors. like

c(x - a)(x - b) = cx² - cax - cbx + cab

what are the "roots" or 0 points ?

either

c = 0

x - a = 0 | x = a

x - b = 0 | x = b

the leading coefficient = 3.

that means nothing else than c = 3.

root = 1 means (x - 1) is one factor.

root = -5 means (x + 5) is the other factor.

so, we have

3(x - 1)(x + 5) = 3x² + 12x - 15

and the equation is

3x² + 12x - 15 = 0

or

3x² + 12x = 15

7 0
2 years ago
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